Various small updates including deprecation removals, task changes and small docs updates
Closes https://gitlab.com/gitlab-org/quality/gitlab-environment-toolkit/-/issues/147
Follow up from closed MR https://gitlab.com/gitlab-org/quality/gitlab-environment-toolkit/-/merge_requests/213. Bring in several small updates that we're going to be merged in that.
Also contains some small docs improvements based on recent feedback.
Edited by Grant Young