Auto merge of #117815 - onur-ozkan:update-change-tracking-impl, r=albertlarsan68

improve bootstrap change-tracking system

This PR aims to improve how change-tracking system works for bootstrap changes by doing the followings:

- Enforce embedding directive informations about the changes on `bootstrap/src/lib.rs`.
- Give more informative change inputs on the terminal (rust-lang/rust#117815 (comment)).
- Avoid spamming the change informations(by reading and creating `.last-warned-change-id` under build output dir).

see the zulip conversation for more details: https://rust-lang.zulipchat.com/#narrow/stream/326414-t-infra.2Fbootstrap/topic/config.2Etoml.20change.20tracking

cc `@RalfJung`

Author: bors