Auto merge of #119373 - Kobzol:missing-tools-bootstrap, r=onur-ozkan

Remove usage of deprecated `missing-tools` bootstrap flag

This PR removes the usage of `--enable-missing-tools` in CI, as this config option is no longer used. It also removes `dist.missing-tools` config completely.

Let me know which commits should I remove (if any).

Fixes: rust-lang/rust#79249

r? `@onur-ozkan`

Author: bors