Epic: CI 3.0

[dave-gantenbein]

• Rework caching in Armada builds #3101
• Introduce caching to other workflows (airflow, release, ...) #3104
• CI: implement check-required action in same fashion as FastTrackML #3189
• CI: Rework/Optimize download target #3190
• Improve cacheability in Python client builds #3105

The MVP criteria for this epic is that an average Armada build should run in 8 minutes or less.

[richscott]

All tasks done - great work, @pavlovic-ivan !

[pavlovic-ivan]

Thank you @richscott !