Admin instance-level page: List project overrides table
### Description As part of https://gitlab.com/gitlab-org/gitlab/-/issues/213857, we introduce a feature called **Project using custom settings** which gives admins visibility into projects which projects are using different settings other than what they have set. #### Proposal 1. Have a way for administrators to see which projects are using the default configuration and which projects have a different config. In later iterations, we will 1. Add a "Use default settings" button for each project that is using custom settings 1. Add a button that sets all projects using custom settings to use default settings For mockups, see the **Designs** section below. #### Checklist - [ ] Can we remove the code added with https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61678? <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION --> *This page may contain information related to upcoming products, features and functionality. It is important to note that the information presented is for informational purposes only, so please do not rely on the information for purchasing or planning purposes. Just like with all projects, the items mentioned on the page are subject to change or delay, and the development, release, and timing of any products, features, or functionality remain at the sole discretion of GitLab Inc.* <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION -->
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