#8067: blank numeric text integration configuration field not validated on save

[grahamlangford]

What does this PR do?

• Fixes #8067

Discussion

• Error message formats are different between validators:

• Unhandled console error when any field is undefined when the validator is run (doesn't seem to cause problems)

Demo

• Paste a screenshot or demo video here

Remaining Work

• [ ] Refactoring
• [ ] Improve unit tests
• [ ] Write Playwright test

Checklist

• [ ] Add tests and/or storybook stories
• [ ] Designate a primary reviewer