[clang] [lldb] Use CLANG_RESOURCE_DIR more consistently (PR #103388)

[Alex Langford via cfe-commits]

https://github.com/bulbazord approved this pull request.

The LLDB changes look good to me. I can't speak for the clang portions but fwiw I think they look ok too.

https://github.com/llvm/llvm-project/pull/103388