Rollup of 13 pull requests

[Centril]

Successful merges:

• Remove mentions of removed offset_to method from align_offset docs #61965 (Remove mentions of removed offset_to method from align_offset docs)
• Syntax: Recover on for ( $pat in $expr ) $block #62928 (Syntax: Recover on for ( $pat in $expr ) $block)
• Impl Debug for Chars #63000 (Impl Debug for Chars)
• Make #![feature(bind_by_move_pattern_guards)] sound without #[feature(nll)] #63059 (Make #![feature(bind_by_move_pattern_guards)] sound without #[feature(nll)])
• Make generic parameters always use modern hygiene #63083 (Make generic parameters always use modern hygiene)
• Add very simple edition check to tidy. #63087 (Add very simple edition check to tidy.)
• Properly check the defining scope of existential types #63093 (Properly check the defining scope of existential types)
• Turn INCOMPLETE_FEATURES into lint #63095 (Turn INCOMPLETE_FEATURES into lint)
• Add tests for some existential_type ICEs #63096 (Add tests for some existential_type ICEs)
• vxworks: Remove Linux-specific comments. #63099 (vxworks: Remove Linux-specific comments.)
• ci: Skip installing SWIG/xz on OSX  #63106 (ci: Skip installing SWIG/xz on OSX )
• Add links to None in Option doc #63108 (Add links to None in Option doc)
• std: Fix a failing fs test on Windows #63109 (std: Fix a failing fs test on Windows)

Failed merges:

r? @ghost