[clang] [llvm] [mlir] [polly] [NFC] Rename `Intrinsic::getDeclaration` to `getOrInsertDeclaration` (PR #111752)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-aarch64-ubuntu` running on `linaro-lldb-aarch64-ubuntu` while building `clang,llvm,mlir,polly` at step 4 "build".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/59/builds/6436

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

```
Step 4 (build) failure: build (failure)
...
1724.915 [2332/10/3987] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/VTableBuilder.cpp.o
1724.917 [2331/10/3988] Building CXX object tools/clang/lib/ASTMatchers/Dynamic/CMakeFiles/obj.clangDynamicASTMatchers.dir/VariantValue.cpp.o
1724.949 [2330/10/3989] Building OpenCLBuiltins.inc...
1725.249 [2330/9/3990] Building CXX object tools/clang/lib/CrossTU/CMakeFiles/obj.clangCrossTU.dir/CrossTranslationUnit.cpp.o
1734.757 [2330/8/3991] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/ABIInfo.cpp.o
1734.872 [2330/7/3992] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/ABIInfoImpl.cpp.o
1735.661 [2330/6/3993] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGAtomic.cpp.o
1736.573 [2330/5/3994] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGCUDANV.cpp.o
1737.317 [2330/4/3995] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGBlocks.cpp.o
1737.747 [2330/3/3996] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGBuiltin.cpp.o
FAILED: tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGBuiltin.cpp.o 
/usr/local/bin/c++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/tools/clang/lib/CodeGen -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/clang/lib/CodeGen -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/clang/include -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/tools/clang/include -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/include -I/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/llvm/include -fPIC -fno-semantic-interposition -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 -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGBuiltin.cpp.o -MF tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGBuiltin.cpp.o.d -o tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/CGBuiltin.cpp.o -c /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/clang/lib/CodeGen/CGBuiltin.cpp
../llvm-project/clang/lib/CodeGen/CGBuiltin.cpp:18885:41: error: no member named 'getDeclaration' in namespace 'llvm::Intrinsic'
 18885 |       return EmitRuntimeCall(Intrinsic::getDeclaration(
       |                              ~~~~~~~~~~~^
1 error generated.
1740.642 [2330/2/3997] Building CXX object tools/clang/lib/CodeGen/CMakeFiles/obj.clangCodeGen.dir/BackendUtil.cpp.o
1745.340 [2330/1/3998] Building CXX object tools/clang/lib/AST/CMakeFiles/obj.clangAST.dir/ASTContext.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/111752