[clang] [clang][StaticAnalyzer] Add enclosing Decl information to bug reports of RawPtrRef(LocalVars|Member)Checker (PR #214102)

[Balázs Benics via cfe-commits]

steakhal wrote:

I'm a bit unsatisfied with the way of testing this.
IMO the `getIssueString` should be tested in a unittest, because it's nice and pure.
How about creating a new unittest as `clang/unittests/Analysis/IssueHashTest.cpp` where we would assert that for a given Decl in a C++ snippet it produces the expected issue hash string.

IMO this would make it clear what's going on in the test than having some `ls` count not add up in LIT.

https://github.com/llvm/llvm-project/pull/214102