Rollup merge of #142606 - azhogin:azhogin/async-drop-without-sync-drop-error, r=oli-obk

AsyncDrop trait without sync Drop generates an error

When type implements `AsyncDrop` trait, it must also implement sync `Drop` trait to be used in sync context and unwinds.
This PR adds error generation in such a case.

Fixes: rust-lang/rust#140696

Author: tgross35