[EPIC] Integration of ACP

[fredcarle]

This epic tracks the list of tasks related to integrating the ACP into DefraDB.

After initial implementation lands, here are the next steps:

1. The following features currently are not allowed or don't work (these can be worked on by the team in a parallel manner):

• https://github.com/sourcenetwork/defradb/issues/2366
• [x] Adding Secondary Indexes
• [ ] Backing/Restoring Private Documents

Note: The above (1) features don't require to expand or tinker with the ACP interface defined in the ./acp package at all. When adding tests don't forget to add a use case example to the README in the ./acp folder.

2. The following features may have undefined/unstable behavior and should be assumed to not be working until proper testing is added for them, so add testing for these:

• [ ] Views
• [x] Average Operations
• [x] Count Operations
• [ ] Group Operations
• [ ] Limit Operations
• [ ] Order Operations
• [ ] Sum Operations
• [ ] Dag/Commit Operations
• [ ] [Delete With Filter Operations](https://github.com/sourcenetwork/defradb/issues/2468
• [ ] Update With Filter Operations
• [ ] Type Join Many Operations
• [ ] Type Join One Operations
• [ ] Parallel Operations
• [ ] Execute Explain

Note: The above (2) features likely might just need to add tests, when adding tests don't forget to add a use case example to the README in the ./acp folder.

3. Somewhat requires ACP/Sourcehub/Identity Knowledge, better to pick above issues if they are available by most devs:

• Migrate to Source Identity Prefix & Validate
• Generate Identity
• Full Auth Identity
• Show/Dump Previously Uploaded Policy
• Configure Auth Identity
• Async Doc Register & Registering Queue
• [x] #2762
• #2905
• #2906

Future features:

• [ ] Permissioned Schema Migration Requests
• [ ] #2640
• [ ] Document Field Access Control (FAC)
• [ ] Use AAC to Turn Off ACP

Resolved:

• [x] Inject Identity In Ctx
• [x] Move Identity flag higher up & Inherit the flag in sub commands