[clang-tools-extra] [clangd] Support outgoing calls in call hierarchy (PR #77556)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-x86_64-debian-fast` running on `gribozavr4` while building `clang-tools-extra` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/56/builds/13090

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
...
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/unittests/tweaks/RemoveUsingNamespaceTests.cpp:9:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/unittests/tweaks/TweakTesting.h:12:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/ParsedAST.h:30:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Frontend/FrontendAction.h:23:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Frontend/ASTUnit.h:28:
/b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Sema/CodeCompleteConsumer.h:338:31: warning: '@class' command should not be used in a comment attached to a non-class declaration [-Wdocumentation]
    /// Code completion in a @class forward declaration.
                             ~^~~~~~~~~~~~~~~~~~~~~~~~~~
4 warnings generated.
16.963 [2/50/1145] Building CXX object tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/CallHierarchyTests.cpp.o
FAILED: tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/CallHierarchyTests.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache /usr/bin/clang++ -DGTEST_HAS_RTTI=0 -DLLVM_BUILD_STATIC -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/b/1/clang-x86_64-debian-fast/llvm.obj/tools/clang/tools/extra/clangd/unittests -I/b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/unittests -I/b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/../include-cleaner/include -I/b/1/clang-x86_64-debian-fast/llvm.obj/tools/clang/tools/extra/clangd/../clang-tidy -I/b/1/clang-x86_64-debian-fast/llvm.src/clang/include -I/b/1/clang-x86_64-debian-fast/llvm.obj/tools/clang/include -I/b/1/clang-x86_64-debian-fast/llvm.obj/include -I/b/1/clang-x86_64-debian-fast/llvm.src/llvm/include -I/b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd -I/b/1/clang-x86_64-debian-fast/llvm.obj/tools/clang/tools/extra/clangd -I/b/1/clang-x86_64-debian-fast/llvm.src/third-party/unittest/googletest/include -I/b/1/clang-x86_64-debian-fast/llvm.src/third-party/unittest/googlemock/include -std=c++11 -Wdocumentation -Wno-documentation-deprecated-sync -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG  -Wno-variadic-macros -Wno-gnu-zero-variadic-macro-arguments -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -Wno-suggest-override -std=c++17 -MD -MT tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/CallHierarchyTests.cpp.o -MF tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/CallHierarchyTests.cpp.o.d -o tools/clang/tools/extra/clangd/unittests/CMakeFiles/ClangdTests.dir/CallHierarchyTests.cpp.o -c /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/unittests/CallHierarchyTests.cpp
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/unittests/CallHierarchyTests.cpp:9:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/ParsedAST.h:24:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/Compiler.h:19:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/ModulesBuilder.h:27:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Frontend/CompilerInvocation.h:23:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/StaticAnalyzer/Core/AnalyzerOptions.h:17:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Analysis/PathDiagnostic.h:16:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/AST/Stmt.h:16:
/b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/AST/APValue.h:372:14: warning: parameter 'UninitArray' not found in the function declaration [-Wdocumentation]
  /// \param UninitArray Marker. Pass an empty UninitArray.
             ^~~~~~~~~~~
/b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/AST/APValue.h:380:14: warning: parameter 'UninitStruct' not found in the function declaration [-Wdocumentation]
  /// \param UninitStruct Marker. Pass an empty UninitStruct.
             ^~~~~~~~~~~~
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/unittests/CallHierarchyTests.cpp:9:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/ParsedAST.h:24:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/Compiler.h:19:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/ModulesBuilder.h:27:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Frontend/CompilerInvocation.h:23:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/StaticAnalyzer/Core/AnalyzerOptions.h:17:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Analysis/PathDiagnostic.h:17:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Analysis/AnalysisDeclContext.h:22:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Analysis/CFG.h:18:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/AST/ExprCXX.h:21:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/AST/DeclCXX.h:22:
/b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/AST/Expr.h:5230:21: warning: '@endcode' command does not terminate a verbatim text block [-Wdocumentation]
  /// literal or an @encode?
                    ^~~~~~~
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/unittests/CallHierarchyTests.cpp:9:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/ParsedAST.h:30:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Frontend/FrontendAction.h:23:
In file included from /b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Frontend/ASTUnit.h:28:
/b/1/clang-x86_64-debian-fast/llvm.src/clang/include/clang/Sema/CodeCompleteConsumer.h:338:31: warning: '@class' command should not be used in a comment attached to a non-class declaration [-Wdocumentation]
    /// Code completion in a @class forward declaration.
                             ~^~~~~~~~~~~~~~~~~~~~~~~~~~
/b/1/clang-x86_64-debian-fast/llvm.src/clang-tools-extra/clangd/unittests/CallHierarchyTests.cpp:601:33: error: use of undeclared identifier 'fromRanges'
                                fromRanges(Source.range("Callee")))));

```

</details>

https://github.com/llvm/llvm-project/pull/77556