DPS: EDC cache management API

[wolf4ood]

Implements APIs for interacting with the EDR cache implemented #3978

The cache will get populated automatically with an extension listening on transfer process start message on client side.

So we should have for now three endpoints:

• Get the EDR by transfer process ID
• Delete the EDR by transfer process ID
• Queries the EDR entry (metadata) with QuerySpec

The API should be plugged in the management-api context but not bundled by default in the management-api