[clang-tools-extra] [clang-tidy] Filter out googletest TUs in bugprone-unchecked-optional-access (PR #115051)

[Carlos Galvez via cfe-commits]

https://github.com/carlosgalvezp requested changes to this pull request.

Relying on Google-test internal implementation details that are outside of our control and may change at any point in time does not feel good. 

The patch should instead fix the root cause of the problem.

https://github.com/llvm/llvm-project/pull/115051