Use CML_TOKEN instead of REPO_TOKEN to

• avoid potential namespace clashes
• better reflect that it could be a project token, org token, bot token, encoded username & password, etc
• better reflect that it's mostly used to launch runners and also is used by runners

• from iterative/cml.dev#122 (comment)
• related #738, #741, #712

jest.it.each reduces the boilerplate test code and improves the readability and maintainability.
Currently config, tools and coverage tests use jest.it.each. The same can be done for utils, extensions and install tests.

Ref:

• https://www.npmjs.com/package/jest-each
• https://elfi-y.medium.com/reduce-boilerplate-test-code-with-jest-it-each-30a0eec9776d

⚠️ Is your feature request related to a problem? Please describe

Add support for code coverage

💡 Describe the solution you'd like

Ideally we could setup jacoco + codecov to have an automated test report after every push/pr.

🤚 Do you want to develop this feature yourself?

• Yes
• No

This feature is up for grab

Feature
Add a new flag to the controller to allow you to define the default scaleDownDelaySecondsAfterScaleOut value preventing the need to have this attribute added to all your HRAs if the default of 10 minutes doesn't work for your environment.

Constant set here
https://github.com/actions-runner-controller/actions-runner-controller/blob/master/controllers/horizontalrunnerautoscaler_co