[Prod] Change checkbox label to "OHS standard goals," fix accessibility issues with table, fix accessibility issues with admin TR form

[thewatermethod]

Description of change

• On the RTR, the checkbox that said "Use OHS initiative goal" now reads "Use OHS standard goal"
• Fix aria labels on Horizontal Table Widget for a much improved screen-reader experience
• Fix validation issues with the admin version of the TR form

How to test

• Confirm that event collaborators and regional point of contact fields are validated on blur if a selection was not made (as an admin on the TR form)
• Confirm hidden labels on Horizontal Table Widget for select row checkboxes and table headers are human-understandable
• Confirm that the checkbox now reads "Use OHS standard goal"

Issue(s)

• https://jira.acf.gov/browse/TTAHUB-3482
• https://jira.acf.gov/browse/TTAHUB-3423
• https://jira.acf.gov/browse/TTAHUB-3420

Checklists

Every PR

• Meets issue criteria
• JIRA ticket status updated
• Code is meaningfully tested
• Meets accessibility standards (WCAG 2.1 Levels A, AA)
• API Documentation updated
• Boundary diagram updated
• Logical Data Model updated
• Architectural Decision Records written for major infrastructure decisions
• UI review complete

Before merge to main

• OHS demo complete
• Ready to create production PR

Production Deploy

• Staging smoke test completed

After merge/deploy

• Update JIRA ticket status