Add `environment` drop down to pod logs screen
In preparation for showing logs on the
Operations tab, we will need to allow users to choose the a particular environment. We should expose an option to allow you to select the environment you would like to view, but default to
production on initial load, if it exists.
- We should consider the implementation of how this is/was done for Metrics, since it shares the same need: gitlab-ce#45738 (closed)
There is an "Environment" dropdown after the "Container" dropdown.