Rollup merge of #126088 - onur-ozkan:brooming, r=albertlarsan68

[1/2] clean-up / general improvements

This PR applies various clippy suggestions on the tools. I have only applied the ones that make sense and left out trivial changes (e.g., suggestions like 'remove &' are ignored to keep the original commit history for the lines).

I am planning to do the same for the library and compiler, but those will add too many changes to this PR, so I will handle them in a separate PR later.

Author: matthiaskrgr