[clang] [analyzer] Remove some false negatives in StackAddrEscapeChecker (PR #125638)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `polly-x86_64-linux-shlib` running on `polly-x86_64-gce2` while building `clang` at step 5 "build".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/99/builds/4643

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

```
Step 5 (build) failure: 'ninja' (failure)
[1/141] Generating VCSRevision.h
[2/141] Generating VCSVersion.inc
[3/141] Building CXX object tools/llvm-config/CMakeFiles/llvm-config.dir/llvm-config.cpp.o
[4/141] Building CXX object lib/Object/CMakeFiles/LLVMObject.dir/IRSymtab.cpp.o
[5/141] Linking CXX static library lib/libLLVMObject.a
[6/141] Linking CXX executable bin/llvm-config
[7/141] Building CXX object tools/clang/lib/Basic/CMakeFiles/obj.clangBasic.dir/Version.cpp.o
[8/141] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/StackAddrEscapeChecker.cpp.o
FAILED: tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/StackAddrEscapeChecker.cpp.o 
ccache /usr/bin/c++ -DCLANG_EXPORTS -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/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.obj/tools/clang/lib/StaticAnalyzer/Checkers -I/home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/lib/StaticAnalyzer/Checkers -I/home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/include -I/home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.obj/tools/clang/include -I/home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.obj/include -I/home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -fno-strict-aliasing -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/StackAddrEscapeChecker.cpp.o -MF tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/StackAddrEscapeChecker.cpp.o.d -o tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/StackAddrEscapeChecker.cpp.o -c /home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/lib/StaticAnalyzer/Checkers/StackAddrEscapeChecker.cpp
/home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/lib/StaticAnalyzer/Checkers/StackAddrEscapeChecker.cpp:252:28: error: declaration of ‘const clang::StackFrameContext* FindStackRegionsSymbolVisitor::StackFrameContext’ changes meaning of ‘StackFrameContext’ [-fpermissive]
  252 |   const StackFrameContext *StackFrameContext;
      |                            ^~~~~~~~~~~~~~~~~
In file included from /home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/include/clang/Analysis/ProgramPoint.h:17,
                 from /home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/include/clang/StaticAnalyzer/Core/Checker.h:16,
                 from /home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/include/clang/StaticAnalyzer/Core/BugReporter/BugType.h:18,
                 from /home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/lib/StaticAnalyzer/Checkers/StackAddrEscapeChecker.cpp:17:
/home/worker/buildbot-workers/polly-x86_64-gce2/rundir/llvm.src/clang/include/clang/Analysis/AnalysisDeclContext.h:299:7: note: ‘StackFrameContext’ declared here as ‘class clang::StackFrameContext’
  299 | class StackFrameContext : public LocationContext {
      |       ^~~~~~~~~~~~~~~~~
[9/141] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/AsmPrinter.cpp.o
[10/141] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/LTO.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/125638