Add ability to create/update a project with fine-grained job token permissions

For the Settings -> CI/CD -> Job token permissions section, we need to add a radio selector to select between default and fine-grained permissions, then implement the permissions list:

Fine-grained permissions	Dropdown values

Specifically:

1. A radio selector with the label Permissions should be added below the group/project dropdown. When Default permissions is selected, the fine-grained permissions list is hidden. When Fine-grained permissions is selected, the list should be shown.

2. The fine-grained permissions list should be added. The descriptions for each item should be left out for now because they are not available yet. The item names should be hard-coded based on the possible values in policies.rb. Alternatively, pass the values from backend to frontend and let frontend parse out the item names.

3. The dropdown should have 3 possible selections: None (default), Read only, and Read and write.

4. In the added group/project list, add an Edit icon button that when clicked, will bring up the same form as the Add group or project button does, except with the group dropdown disabled.