Migrate from Sentry.io to Rollbar monitoring solution

[tom2drum]

Description and Related Issue(s)

Resolves #2402

Proposed Changes

Added NEXT_PUBLIC_ROLLBAR_CLIENT_TOKEN for enabling Rollbar integration. NEXT_PUBLIC_SENTRY_DSN, SENTRY_CSP_REPORT_URI, NEXT_PUBLIC_SENTRY_ENABLE_TRACING are marked as deprecated.

Checklist for PR author

• [x] I have tested these changes locally.
• [x] I added tests to cover any new functionality, following this guide
• [x] Whenever I fix a bug, I include a regression test to ensure that the bug does not reappear silently.
• [x] If I have added, changed, renamed, or removed an environment variable
  • I updated the list of environment variables in the documentation
  • I made the necessary changes to the validator script according to the guide
  • I added "ENVs" label to this pull request