Auto merge of #71014 - Centril:rollup-3lc8cnt, r=Centril

Rollup of 5 pull requests

Successful merges:

 - #69573 (tests encoding current behavior for various cases of "binding" to _.)
 - #70881 (bootstrap: work around "unused attribute" errors in incremental stdlib rebuilds.)
 - #70957 (Normalize MIR locals' types for generator layout computation.)
 - #70962 (added machine hooks to track deallocations)
 - #70982 (Normalize function signature in function casting check procedure)

Failed merges:

r? @ghost