This commit refactors the code not to use CTE joins
between deployments/environments and ci_builds/pipelines.

The plan for RSpec 4.0 is to disable monkey patching, reference:
https://rspec.info/blog/2013/07/the-plan-for-rspec-3/#zero-monkey-patching-mode
https://relishapp.com/rspec/rspec-core/docs/configuration/zero-monkey-patching-mode

This commit stops using RSpec monkey patching in several specs.

This commit removes the feature flag

This commit adds environment auto stop worker