Auto merge of #62192 - Centril:rollup-kssnlta, r=Centril

Auto merge of #62192 - Centril:rollup-kssnlta, r=Centril

Rollup of 16 pull requests

Successful merges:

 - #61878 (improve pinning projection docs)
 - #62043 (Remove `FnBox`)
 - #62067 (Add suggestion for missing `.await` keyword)
 - #62076 (Updated RELEASES.md for 1.36.0)
 - #62102 (call out explicitly that general read needs to be called with an initialized buffer)
 - #62106 (Add more tests for async/await)
 - #62124 (refactor lexer to use idiomatic borrowing)
 - #62131 (libsyntax: Fix some Clippy warnings)
 - #62152 (Don't ICE on item in `.await` expression)
 - #62154 (Remove old fixme)
 - #62155 (Add regression test for MIR drop generation in async loops)
 - #62156 (Update books)
 - #62160 (Remove outdated question_mark_macro_sep lint)
 - #62164 (save-analysis: use buffered writes)
 - #62171 (rustc: Retry SIGILL linker invocations)
 - #62176 (Update RLS)

Failed merges:

r? @ghost