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

[Congcong Cai via cfe-commits]

https://github.com/HerrCai0907 commented:

I am still confused why your team did not just disable this rule for test folder?
It is normal cases that source code and test code have different quality metrics.

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