Project Setting: Add toggle to remove Operations left nav item
### Problem to solve
In project settings, there are a number of left sidebar menu items that can be toggled off such as the repository, issues, and snippets; however, there are a number of items that cannot be toggled off which leads to a poor user experience if the project isn't ever going to utilize those features.
### Proposal
We should allow users to toggle off the Operations left nav item in Project Settings => General => Visibility, Project Features, and Permissions. Please copy the design for how we allow users to toggle off repositories, issues, and snippets.
A clear summary around expectations can be found further down in [this comment](https://gitlab.com/gitlab-org/gitlab/-/issues/224698#note_451597557)
### Documentation
We will need to update our documentation on project settings.
issue