[clang-tools-extra] [clangd] Support outgoing calls in call hierarchy (PR #77556)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

Thanks @ckandeler for the review! I addressed the comments in https://github.com/llvm/llvm-project/pull/77556/commits/bad4f7264433417763ea35bc1104fb087c8725e5.

https://github.com/llvm/llvm-project/pull/77556