[clang] [clang-tools-extra] [clang][AST] Fix StmtProfile handling of GCCAsmStmt asm strings and clobbers (PR #201481)

[Baranov Victor via cfe-commits]

https://github.com/vbvictor approved this pull request.

LGTM, but please also add release note to `clang-tools-extra/ReleaseNotes.rst` so that people know about the fix:)
Forgot to mention it before.. sorry
I'm not sure if we need a release note on clang side (not familiar how things are done)

https://github.com/llvm/llvm-project/pull/201481