Move CLI utilities into internal/util/cli from internal/util to balance tests

[evankanderson]

Summary

I saw timeouts on internal/util tests, possibly due to recently-merged #4651 increasing the total set of tests in internal/util by a fair amount to hit the 10m limit.

This PR moves a bunch of those new tests into internal/cli, along with the implementation (which is only used by the CLI, and not Minder server).

Change Type

Mark the type of change your PR introduces:

• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Ran unit tests locally.

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[JAORMX]

sensible

[eleftherias]

I'm not sure why the tests are failing here, I ran them locally and they passed

[JAORMX]

Solar flares

[evankanderson]

There seems to be some variance in performance on the GitHub workers -- sometimes they take 11 minutes and everything is fine, and sometimes they take ~17 minutes, and time out.

[coveralls]

coverage: 57.404% (+0.003%) from 57.401%
when pulling e08bc1e on evankanderson:move-cli-util
into fc18f0f on mindersec:main.