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

[Nikolas Klauser via cfe-commits]

philnik777 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.

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