Auto merge of #89512 - Manishearth:rollup-meh9x7r, r=Manishearth

Rollup of 14 pull requests

Successful merges:

 - #86434 (Add `Ipv6Addr::is_benchmarking`)
 - #86828 (const fn for option copied, take & replace)
 - #87679 (BTree: refine some comments)
 - #87910 (Mark unsafe methods NonZero*::unchecked_(add|mul) as const.)
 - #88286 (Remove unnecessary unsafe block in `process_unix`)
 - #88305 (Manual Debug for Unix ExitCode ExitStatus ExitStatusError)
 - #88353 (Partially stabilize `array_methods`)
 - #88370 (Add missing `# Panics` section to `Vec` method)
 - #88481 (Remove some feature gates)
 - #89138 (Fix link in Ipv6Addr::to_ipv4 docs)
 - #89401 (Add truncate note to Vec::resize)
 - #89467 (Fix typos in rustdoc/lints)
 - #89472 (Only register `WSACleanup` if `WSAStartup` is actually ever called)
 - #89505 (Add regression test for spurious const error with NLL)

Failed merges:

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