**Environment page:**
- [x] Add provider button below Cloud Provider section
- [x] Render provider tab contents as additional entries under Cloud Provider section
- [x] Cloud Provider entries that are not created via cluster hack (and don't overlap with environment variables) should have an edit option that scrolls the provider card/tab into view
- [x] When possible, all providers should be editable in the provider tab

**Deployment editor:**
- [x] Iterate through connections to determine which ResourceTypes can be used instead of limiting to the primary provider

**Tangentially related (environment page):**
- [x] Cloud Provider entry should have key value pairs regardless of whether a gitlab cluster was created with the environment
- [ ] As above, but ensure this doesn't break things when the current user doesn't have access to environment variables

**Updates:**
- [x] Edit providers in a modal
- [x] Prevent multiple providers of the same type