Add ability to add tag to pslots with generate_workflows

[WalterKolczynski-NOAA]

Description

generate_workflows.sh would only use the case name as the pslot, leading to conflicts if you try to run two different sets at the same time. Now there is a new option that allows a 'tag' to the case name when determining the pslots:

generate_workflows.sh -t <tag>

tag: string to be added to end of case name

For example, this:

generate_workflows.sh -t test

Will result in pslots of C48_ATM_test, C48_S2SW_test, etc.

This is similar to how the CI system appends the hash to the pslots, but allows flexibility since this is a command-line tool.

Type of change

• Bug fix (fixes something broken)
• New feature (adds functionality)
• Maintenance (code refactor, clean-up, new CI test, etc.)

Change characteristics

• Is this a breaking change (a change in existing functionality)? NO
• Does this change require a documentation update? NO
• Does this change require an update to any of the following submodules? NO

How has this been tested?

• Ran generate_workflows.sh both with and without the new -t option.

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
• Any new scripts have been added to the .github/CODEOWNERS file with owners
• I have made corresponding changes to the system documentation if necessary

[DavidHuber-NOAA]

Looks good, thanks for this feature Walter!