[llvm] Refactored verbosity flag in mlgo-utils to common location #107898 (PR #128541)

[Mircea Trofin via llvm-commits]

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mtrofin wrote:

nit: can you rename this to `flags` or `tool_flags` (open to other suggestions):
- we only use the `_lib` naming pattern when we have a tool and want to unittest it, so most of the tool logic is moved to the `_lib`, leaving the tool itself be basically the `main`
- an advantage of your patch is that it encapsulates the dependency on a specific arg parsing library (argparse), so renaming it away from what it encapsulates and towards what it provides its users makes sense, imho.

Thanks!

https://github.com/llvm/llvm-project/pull/128541