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

[Julian Schmidt via cfe-commits]

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5chmidti wrote:

Please also add an `ASSERT_FALSE` (or just `ASSERT_TRUE(!opt.has_value())`) with a dereference after, to show that there are false-negatives

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