[clang-tools-extra] [clangd] fix compilation errors with newer versions of gRPC (PR #67258)

[via cfe-commits]

0xacc wrote:

> Thanks. I've triggered the rebuilds: https://lab.llvm.org/buildbot/#/builders/169/builds/19516 and https://lab.llvm.org/buildbot/#/builders/55/builds/23522.
> 
> If you got this error message, perhaps you weren't logged in? You can log in in the top right corner.

It seems all the failed tests succeeded this time. I really appreciate your help. Thanks!

https://github.com/llvm/llvm-project/pull/67258