[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 https://github.com/llvm/llvm-project/commit/567b2c608c307c097315dd5ec4d6a5bbcddf898d, so it no longer crashes. If you recommit this or checkout to 5b363483cf2461617fbb2449491c9914811c8d53, you can repro the crash.

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