[llvm] [CI] include utils in monolithic scripts (PR #158090)

[Maksim Levental via llvm-commits]

makslevental wrote:

FYI I don't see how you can keep blocking this change - the facts are 

1. that this PR is completely NFC at HEAD;
2. You have no technical reason for blocking the change other than "I don't like it";
3. The other PR is up and you simply air these concerns there instead of here because your concerns are about that one.

https://github.com/llvm/llvm-project/pull/158090