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

[Carlos Galvez via cfe-commits]

carlosgalvezp wrote:

Apologies for the late response, I don't have much time to perform in-depth reviews. Tagging additional reviewers  @5chmidti @HerrCai0907 

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