[clang-tools-extra] [clangd] Add inlay hints for default function arguments (PR #95712)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

Thanks. The buildkite failure looks unrelated (it's a `clang-move` test, and this patch only touches `clangd` code), so I will go ahead and merge this.

https://github.com/llvm/llvm-project/pull/95712