[clang] [clang] Clang should detect illegal copy constructor with template class as its parameter (PR #81251)

[Rajveer Singh Bharadwaj via cfe-commits]

Rajveer100 wrote:

I have removed this entirely, although it still may not be optimal, it did reduce few more test failures:

```C++
Constructor->getTemplateSpecializationKind() !=
          TSK_ImplicitInstantiation
```

Any particular suggestions apart from updating the tests?

https://github.com/llvm/llvm-project/pull/81251