Use ubuntu-22.04 on github runner

[aerorahul]

Description

This PR reverts to ubuntu-22.04 image of the GH runner. ubuntu-latest is having an issue with python pip.

Type of change

• Maintenance (code refactor, clean-up, new CI test, etc.)

Change characteristics

• Is this a breaking change (a change in existing functionality)? YES/NO
• Does this change require a documentation update? YES/NO
• Does this change require an update to any of the following submodules? YES/NO (If YES, please add a link to any PRs that are pending.)
  • EMC verif-global
  • GDAS
  • GFS-utils
  • GSI
  • GSI-monitor
  • GSI-utils
  • UFS-utils
  • UFS-weather-model
  • wxflow

How has this been tested?

Checklist

• Any dependent changes have been merged and published
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have documented my code, including function, input, and output descriptions
• My changes generate no new warnings
• New and existing tests pass with my changes
• This change is covered by an existing CI test or a new one has been added
• I have made corresponding changes to the system documentation if necessary