entity_pass.cc has been excluded from clang-tidy runs in flutter/engine#44495 by @zanderso and @bdero has also noticed issues with ClangD using the same.

This may be because of the inclusion of impeller::ContentContext which makes heavy use of templates. We could sidestep these by moving template instantiations into content_context.cc.

But, the root cause of this is still unknown and this issue tracks making the developer experience better.