Rollup of 6 pull requests

Successful merges:

 - rust-lang#86206 (Fix type checking of return expressions outside of function bodies)
 - rust-lang#86358 (fix pretty print for `loop`)
 - rust-lang#86568 (Don't dist miri or rust-analyzer on stable or beta.)
 - rust-lang#86683 (:arrow_up: rust-analyzer)
 - rust-lang#86687 (Allow anyone to set `perf-regression` label)
 - rust-lang#86688 (Add a regression test for issue-65384)

Failed merges:

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

…Mark-Simulacrum

Fix rust-analyzer install when not available.

This changes it so that `x.py install` won't fail if rust-analyzer isn't available. This was changed in rust-lang#86568 to handle the case where installing on stable/beta, and `extended=true`, to skip rust-analyzer. But I neglected to update the install part to also ignore it.

Fixes rust-lang#86999

miri fails if there's no git repository anywhere in directory tree
however miri and rust-analyzer were not supposed to be built on stable
channel in the first place:

rust-lang/rust#86568
rust-lang/rust#87007