Auto merge of #115759 - oli-obk:open_drop_from_non-ADT, r=lcnr

Reveal opaque types before drop elaboration

fixes rust-lang/rust#113594

r? `@cjgillot`

cc `@JakobDegen`

This pass was introduced in rust-lang/rust#110714

I moved it before drop elaboration (which only cares about the hidden types of things, not the opaque TAIT or RPIT type) and set it to run unconditionally (instead of depending on the optimization level and whether the inliner is active)

Author: bors