[clang] [Coverage] Skip coverage mapping for consteval member functions (PR #190870)

[Corentin Jabot via cfe-commits]

https://github.com/cor3ntin commented:

LGTM but need a release note

Please add an entry to `clang/docs/ReleaseNotes.rst` in the section the most adapted to the change, and referencing any Github issue this change fixes. Thanks!

https://github.com/llvm/llvm-project/pull/190870