Allow users to specify that an array list is required

[codyrancher]

Summary

This is in support of Harvester. The forked version of ArrayListSelect was using this field in this way:

Areas or cases that should be tested

You can add the required field to any array list which has a title.

Areas which could experience regressions

Shouldn't be any. Respects the existing default of false.

Screenshot/Video

This change adds the exact same visual that was present in harvester even though I don't love it:

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
• The PR has a Milestone
• The PR template has been filled out
• The PR has been self reviewed
• The PR has a reviewer assigned
• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes

[rak-phillip]

This change adds the exact same visual that was present in harvester even though I don't love it:

Yeah, I don't love it either.. since this is an existing implementation, I think that we make do with what we have and enhance later.