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

[Jan Voung via cfe-commits]

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jvoung wrote:

Done (there was a false-negative example in `unchecked_value_access` but also added the ASSERT_FALSE)

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