[clang] [Coroutines] Allow [[clang::coro_wrapper]] for class (PR #93268)

[Utkarsh Saxena via cfe-commits]

usx95 wrote:

@snarkmaster
> What did you envision the effect of adding `coro_wrapper` to a class would be 
> on lifetime checks? 


All coro wrappers continue to participate in lifetime checks (i.e., all params 
implicitly treated as `lifetimebound`) if not annotated with 
`coro_disable_lifetimebound`~
```
  if (const auto *RD = Callee->getReturnType()->getAsRecordDecl()) {
    CheckCoroCall = RD->hasAttr<CoroLifetimeBoundAttr>() &&
                    RD->hasAttr<CoroReturnTypeAttr>() &&
                    !Callee->hasAttr<CoroDisableLifetimeBoundAttr>();
  }
```


https://github.com/llvm/llvm-project/pull/93268
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