[clang] [llvm] [clang-tools-extra] [Clang] Fix : More Detailed "No expected directives found" (PR #78338)

[Shourya Goel via cfe-commits]

Sh0g0-1758 wrote:

Hey @AaronBallman, I have added a test for the same in ```clang/test/Frontend/verify.c``` and made the necessary changes as well. I have added a short **PR SUMMARY** to the top-level comment as you instructed. As for changes in other error messages, I think its best to merge this PR and raise a separate PR for the same. 

https://github.com/llvm/llvm-project/pull/78338