[llvm-branch-commits] [clang-doc] Use LangOpts when printing types (PR #120308)

[Paul Kirth via llvm-branch-commits]

https://github.com/ilovepi created https://github.com/llvm/llvm-project/pull/120308

The implementation in the clang-doc serializer failed to take in the
LangOpts from the declaration. Asa result, we'd do things like print
`_Bool` instead of `bool`, even in C++ code.

Fixes #62970