Removed ignored_components for PA to optin

Background

As it relates to updating to new custom target durations for grouppipeline authoring endpoints, this MR is following the instructions to remove the ignored_components key for grouppipeline authoring to opt-in to apply new custom target durations.

For changes to dashboards, please provide a link to the test dashboard for quick reviewing, example:

https://dashboards.gitlab.net/d/stage-groups-pipeline_authoring/stage-groups-group-dashboard-verify-pipeline-authoring?orgId=1

Associated MR for grouppipeline authoring - gitlab-org/gitlab!75795 (merged)