Auto merge of #65990 - Centril:rollup-v843h4a, r=Centril

Rollup of 7 pull requests

Successful merges:

 - #65274 (Upload toolstates.json to rust-lang-ci2)
 - #65434 (Add long error explanation for E0577)
 - #65850 (Update comments re type parameter hack in object safety)
 - #65955 (ci: revert msys2 ca-certificates hack)
 - #65959 (Fix an incorrect docstring for Immediate in librustc_mir/interpret.)
 - #65979 (Switch CrateMetadata's source_map_import_info from RwLock to Once)
 - #65981 (work around aggressive syntax feature gating)

Failed merges:

r? @ghost