Auto merge of #140932 - onur-ozkan:llvm-tools, r=Kobzol

update llvm-tools logic for `dist` and `install` steps

First commit aligns `build_steps::compile` and `build_steps::dist` logics for copying llvm-tools, and the second commit adds the correct `should_run` condition for `LlvmTools` step as the previous one was clearly incorrect.

Fixes #140913

Author: bors