Allow editing room requests in certain states

Currently, users cannot edit a room request after it has been submitted. We should allow both the user which created the request, or `ROOM_REQUEST_ADMIN` app role, to modify the room request only when it is the following states:

- CREATED
- MORE_INFORMATION_NEEDED
- REJECTED_BY_ACM
- REJECTED_BY_UIUC

This change requires modification to both the UI and API to allow these changes and enforce the constraints.

These are "recoverable" states (and should be added to types file so it can be used in the UI and API). We can modify the `verifyRoomRequestAccess` function to add `isEditing` parameter to check these conditions.