Auto merge of #149531 - Zalathar:rollup-15y580s, r=Zalathar

Rollup of 8 pull requests

Successful merges:

 - rust-lang/rust#145628 ([std][BTree] Fix behavior of `::append` to match documentation, `::insert`, and `::extend`)
 - rust-lang/rust#149241 (Fix armv4t- and armv5te- bare metal targets)
 - rust-lang/rust#149470 (compiletest: Prepare ignore/only conditions once in advance, without a macro)
 - rust-lang/rust#149507 (Mark windows-gnu* as lacking build with assertions)
 - rust-lang/rust#149508 (Prefer helper functions to identify MinGW targets)
 - rust-lang/rust#149516 (Stop adding MSYS2 to PATH)
 - rust-lang/rust#149525 (debuginfo/macro-stepping test: extend comments)
 - rust-lang/rust#149526 (Add myself (mati865) to the review rotation)

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