[6.15.z] New improvements and fixes to pytest req updates plugin

[Satellite-QE]

Cherrypick of PR: #16692

Problem Statement

• UV package manager support was not available
• Broker requirement not being handled well as optional backends/installations were activated
• pyYMAL requirement was not handled well
• airgun and nailgun git installations were not handled well as they don't have versions to compare

Solution

• UV package manager support is added
• Broker handled for optional backends/installations
• pyYMAL requirement now handled
• airgun and nailgun git installations are handled and now wont be reported as deviation but would be updated

Logs:

# pytest -s --collect-only tests/foreman/api/test_product.py --update-all-reqs
============= test session starts ===============
platform darwin -- Python 3.12.2, pytest-8.3.3, pluggy-1.5.0
Using Python 3.12.2 environment at /Users/jyejare/venv/uv_robo_master
 Updated https://github.com/SatelliteQE/airgun.git (98c53e4)
 Updated https://github.com/SatelliteQE/nailgun.git (08bbd9a)                                                                                                                                                         Resolved 83 packages in 2.83s
Audited 83 packages in 0.15ms
Required requirements are updated.
Optional Requirements are up to date.
To update requirements, run the pytest with '--update-required-reqs' OR '--update-all-reqs' option.