Add aria labels to table filters and Import YAML code editor

[rak-phillip]

Summary

This adds aria labels to the table filter input and the Import YAML code editor.

Fixes #12818

Occurred changes and/or fixed issues

• add aria label to the table filter input
• add aria label the Import YAML code editor

Technical notes summary

🗒️ NOTE: The code mirror component requires a special option, screenReaderLabel, to assign the aria-label to the correct element.

Areas or cases that should be tested

• Basic table filters should now have an aria label associated with them
• Import YAML code editor should have an aria label associated with it

Areas which could experience regressions

• NA

Screenshot/Video

• NA

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

[aalves08]

LGTM. Simple change. I think I'll incorporate the screenReaderLabel to my header PR since I think I've reached a viable solution to the keyboard nav problem. 🙏