[clang] [Clang] Fix __is_trivially_equality_comparable returning true with ineligebile defaulted overloads (PR #93113)

[Zequan Wu via cfe-commits]

ZequanWu wrote:

> > > @ZequanWu I can't successfully build your reproducer with clang trunk. Would it be possible to provide the full test case or a fully reduced one?
> > 
> > 
> > Because I reverted this change at [567b2c6](https://github.com/llvm/llvm-project/commit/567b2c608c307c097315dd5ec4d6a5bbcddf898d), so it no longer crashes. If you recommit this or checkout to [5b36348](https://github.com/llvm/llvm-project/commit/5b363483cf2461617fbb2449491c9914811c8d53), you can repro the crash.
> 
> No, I mean it isn't a well-formed program. There are semicolons missing after class definitions.

That's caused by creduce but it shouldn't matter (clang shouldn't crash due to syntax errors). I attached the original crash source here as creduce is still running. The command to repro is same as above.
[rtp_transmission_manager-8cce12.txt](https://github.com/user-attachments/files/16041931/rtp_transmission_manager-8cce12.txt)



https://github.com/llvm/llvm-project/pull/93113