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

[Maksim Levental via llvm-commits]

makslevental wrote:

> More information on what exactly this is intended to test would be good.
> 
> It also looks like this is on by default?
> 
> https://github.com/llvm/llvm-project/blob/89e32acde5a8a0059219ca319ee6bb2114104b49/llvm/CMakeLists.txt#L849

#157944 adds an install test. Also yes the first two are on by default but I thought it better to be efficient explicit

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