[clang] [clang-tools-extra] [clangd] Collect comments from function definitions into the index (PR #67802)

[Christian Kandeler via cfe-commits]

ckandeler wrote:

> I wrote a libAST unit test to demonstrate the bug, and filed #108145 about it. Hopefully folks more familiar with that code can suggest an appropriate fix there.

Awesome, thanks.

https://github.com/llvm/llvm-project/pull/67802