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

[Rajveer Singh Bharadwaj via cfe-commits]

Rajveer100 wrote:

@cor3ntin @shafik 

I am not quite sure if this is the intended fix, also I will check the few other failing tests once the _CI_ completes its job.

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