move airflow to nowcasting

[peterdudfield]

Pull Request

Description

Move airflow over to nowcasting platform
I left a TODO because I didnt want to change the actual airflow module

Note a new password would get made, so we would have to update where this is stored

Needed to add ecs_security_group to variables

Helps with #302

How Has This Been Tested?

Terraform run on CI

• Yes

If your changes affect data processing, have you plotted any changes? i.e. have you done a quick sanity check?

• Yes

Checklist:

• My code follows OCF's coding style guidelines
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked my code and corrected any misspellings

[peterdudfield]

I'm gona push this through, but happy to take any comments afterwards