[CLI Improvements] Migrate DataStores to resource manager architecture

[danielbdias]

To adapt the DataStore resource to the resource manager architecture, we should:

1. Update the OpenAPI specs considering the new endpoints
2. Create new endpoints using the Resource Manager structure on the Backend
3. Update the code that uses the resource on the backend to use the new resource manager repository
4. Adapt the CLI to have commands that use this new structure and make the old ones deprecated
5. Adapt the frontend calls to consider the new endpoints
6. Update the documentation related to this resource

Our reference should be the DataStore specification on #2182.

Tasks to do

• [CLI Improvements] Migrate DataStores to resource manager architecture - OpenAPI #2343
• [CLI Improvements] Migrate DataStores to resource manager architecture - Backend #2341
• [CLI Improvements] Migrate DataStores to resource manager architecture - CLI #2342
• [CLI Improvements] Migrate DataStores to resource manager architecture - Frontend #2344
• [CLI Improvements] Migrate DataStores to resource manager architecture - Documentation #2345

[danielbdias]

Added branch feature/datastore-as-resource to control this feature.