Migrate broadcast messages form errors to pajamas alert

What does this MR do and why?

Migrates the form errors for broadcast messages to use Pajamas alert

Screenshots or screen recordings

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Closes #364945 (closed)