[clang-tools-extra] [clangd] forward clang-tidy's readability-identifier-naming fix to textDocument/rename (PR #78454)

[Nathan Ridge via cfe-commits]

https://github.com/HighCommander4 requested changes to this pull request.

Ok, I had a more detailed look at the implementation. Still looks good overall, just have some minor comments.

https://github.com/llvm/llvm-project/pull/78454