Rollup of 12 pull requests

[compiler-errors]

Successful merges:

• btree: add {Entry,VacantEntry}::insert_entry #133042 (btree: add {Entry,VacantEntry}::insert_entry)
• Lexer tweaks #133070 (Lexer tweaks)
• Support ranges in <[T]>::get_many_mut() #133136 (Support ranges in <[T]>::get_many_mut())
• Inline ExprPrecedence::order into Expr::precedence #133140 (Inline ExprPrecedence::order into Expr::precedence)
• Yet more rustc_mir_dataflow cleanups #133155 (Yet more rustc_mir_dataflow cleanups)
• Shorten the MaybeUninit Debug implementation #133282 (Shorten the MaybeUninit Debug implementation)
• Remove the DefinitelyInitializedPlaces analysis. #133326 (Remove the DefinitelyInitializedPlaces analysis.)
• No need to re-sort existential preds in relate impl #133362 (No need to re-sort existential preds in relate impl)
• Simplify array length mismatch error reporting (to not try to turn consts into target usizes) #133367 (Simplify array length mismatch error reporting (to not try to turn consts into target usizes))
• Bail on more errors in dyn ty lowering #133394 (Bail on more errors in dyn ty lowering)
• target check_consistency: ensure target feature string makes some basic sense #133410 (target check_consistency: ensure target feature string makes some basic sense)
• miri: disable test_downgrade_observe test on macOS #133435 (miri: disable test_downgrade_observe test on macOS)

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup