
Build and x64 dimension was introduced in https://github.com/flutter/engine/pull/50901, and I blindly copied it into the .ci.yaml in https://github.com/flutter/engine/pull/56014. However I don't think clangd needs to run on the scarce (and flakier) Intel Macs (37 x64 bots in prod vs 55 arm bots). Suspect this was copied from clang_tidy #26910 [C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style