Auto merge of #149979 - ChrisDenton:rollup-9rvyn3h, r=ChrisDenton

Rollup of 8 pull requests

Successful merges:

 - rust-lang/rust#148755 (Constify `DropGuard::dismiss` and trait impls)
 - rust-lang/rust#148825 (Add SystemTime::{MIN, MAX})
 - rust-lang/rust#149272 (Fix vec iter zst alignment)
 - rust-lang/rust#149417 (tidy: Detect outdated workspaces in workspace list)
 - rust-lang/rust#149773 (fix va_list test by adding a llvmir signext check)
 - rust-lang/rust#149894 (Update to mdbook 0.5)
 - rust-lang/rust#149955 (Fix typo in armv7a-vex-v5 documentation)
 - rust-lang/rust#149972 (Enable to ping LoongArch group via triagebot)

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

Author: bors