feat: Platform Engineer can configure CF feature flags via bosh deplo…

[hsinn0]

…yment

• Added the code to override default feature flags upon initialization of new deployment.
• TNZ-48301

Thanks for contributing to cloud_controller_ng. To speed up the process of reviewing your pull request please provide us with:

• A short explanation of the proposed change:
  The objective: Platform engineer can override feature flags in the capi release bosh deployment manifest.

  Manifest example:

  - consumes: {}
    name: cloud_controller_ng
    properties:
      <snip>
      cc:
      <snip>
        feature_flag_overrides:
          diego_docker: true
          route_sharing: true

• An explanation of the use cases your change solves
  See the above.

• Links to any other associated PRs
  feat: Platform Engineer can configure CF feature flags via bosh deplo… capi-release#567

• I have reviewed the contributing guide

• I have viewed, signed, and submitted the Contributor License Agreement

• I have made this pull request to the main branch

• I have run all the unit tests using bundle exec rake

• I have run CF Acceptance Tests

[Gerg]

Overall, this PR looks really good.

I left a few comments with code style and error message suggestions. Happy to chat, if you want to go into more detail on any of them.

[Gerg]

Approved!