Refactor airflow specs

• Refactored airflow components resources requests
• Enabled autoscale by default
• Get rid of the airflow2 ingress
• Fix default ingress values for ddms
• Refactored airflow2 dependencies to not break on build and not install postgres and redis.
• Refactored the ingress settings for osdu-ddms (removing)
• Updated README for osdu-airflow2
• Created unit test report for golang helm template unit tests
• Created additional unit test to check if postgres or redis are getting installed by default

Closes #20 (closed)