[clang-tools-extra] added option `google-readability-namespace-comments.AllowNoNamespaceComments` (PR #124265)

[Carlos Galvez via cfe-commits]

carlosgalvezp wrote:

@vbvictor it seems this was merged before the CI checks finished running, next time please wait for that ;) Could you or @thorsten-klein fix the broken autoformatter?

https://github.com/llvm/llvm-project/pull/124265