[clang-tools-extra] clangd: Make callHierarchy follow inheritance (PR #163024)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

I've checked out this PR locally, and for me it both builds successfully with `-DCLANGD_ENABLE_REMOTE=ON`, and passes `ninja check-clangd`.

I guess what ultimately matters is whether it builds and passes tests on the buildbot that tests this configuration. I don't think there's a way for us to check that in advance (since this configuration is not exercised by the pre-commit CI), so we'll have to try merging it and see.

https://github.com/llvm/llvm-project/pull/163024