[clang] Implement resource binding type prefix mismatch flag setting logic (PR #97103)

[Damyan Pepper via cfe-commits]

https://github.com/damyanp requested changes to this pull request.

I'm a bit confused by this change.  It seems that some tweaks have been made to the diagnostics, and something code around register_binding_flags has been added, but doesn't seem to be tested at all.

It seems it should be possible to slice this so that changes do come in with tests and aren't entirely around anticipating future functionality.

https://github.com/llvm/llvm-project/pull/97103