Auto merge of #134952 - Zalathar:rollup-i6g97md, r=Zalathar

Rollup of 8 pull requests

Successful merges:

 - #134919 (bootstrap: Make `./x test compiler` actually run the compiler unit tests)
 - #134927 (Make slice::as_flattened_mut unstably const)
 - #134930 (ptr docs: make it clear that we are talking only about memory accesses)
 - #134932 (explicitly set float ABI for all ARM targets)
 - #134933 (Make sure we check the future type is `Sized` in `AsyncFn*`)
 - #134934 (Fix typos)
 - #134941 (compiler: Add a statement-of-intent to `rustc_abi`)
 - #134949 (Convert some `Into` impls into `From` impls)

r? `@ghost`
`@rustbot` modify labels: rollup