Auto merge of #55579 - pietroalbini:rollup, r=kennytm

Rollup of 13 pull requests

Successful merges:

 - #55280 (Add libproc_macro to rust-src distribution)
 - #55469 (Regression tests for issue #54477.)
 - #55504 (Use vec![x; n] instead of iter::repeat(x).take(n).collect())
 - #55522 (use String::from() instead of format!() macro to construct Strings.)
 - #55536 (Pass suggestions as impl Iterator instead of Vec)
 - #55542 (syntax: improve a few allocations)
 - #55558 (Tweak `MatcherPos::matches`)
 - #55561 (Fix double_check tests on big-endian targets)
 - #55573 (Make sure the `aws` executable is in $PATH on macOS)
 - #55574 (Use `SmallVec` within `MoveData`.)
 - #55575 (Fix invalid_const_promotion test on some archs)
 - #55578 (Made doc example of `impl Default for …` use `-> Self` instead of explicit self type)
 - #55582 (Remove unused import copy from publish_toolstate.py)

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