feat: add instance name to mwaa ui

[botanical]

Summary: Summary of changes

Addresses VEDA-161: Add app name and stage to airflow UI title

Changes

• Adds prefix to the instance name so the UI would have a header of the deployment prefix + "DAGs"

PR Checklist

• [ ] Update CHANGELOG
• [ ] Unit tests
• [x] Ad-hoc testing - Deploy changes and test manually
• [ ] Integration tests