Auto merge of #134692 - GrigorenkoPV:sync_poision, r=tgross35

Move some things to `std::sync::poison` and reexport them in `std::sync`

Tracking issue: #134646

r? `@tgross35`

I've used `sync_poison_mod` feature flag instead, because `sync_poison` had already been used back in 1.2.

try-job: x86_64-msvc

Author: bors