Add common TypeInstance injection

Description

Blocked by: https://github.com/capactio/capact/pull/630

To make it easy to define injection of backend storage for TypeInstances with dynamic values, in Global and Action Policies we need to introduce an additional feature—common TypeInstance injection configuration:

interface:
  rules: [] # rules for Interfaces, now nested under `interface`

  default: # properties applied to all rules above
    inject:
      requiredTypeInstances:
        - id: "3ef2e4ac-9070-4093-a3ce-142139fd4a16"
          description: "Helm storage (cap.type.helm.storage:0.1.0)"

          # it works globally, not only for storage backends:
        - id: "c4f66896-c2a1-4031-b847-b55ae6a26c80"
          description: "GCP SA (cap.type.gcp.auth.service-account:0.1.0)"

typeInstance:
  rules: [] # ...

Acceptance Criteria

Extends the Policy GraphQL syntax
Update Policy GraphQL Go client (ensure that new policy can be saved and retrieved with update capact CLI)
Update PolicyEnforceClient
- Doesn't affect Implementation selection (do not change ListImplementationRevisionsForInterface method)
- Support injecting arbitrary required TypeInstances
- Support Storage backends: https://github.com/capactio/capact/blob/86f0be8dbe65c3e69620e9a1343ea88e514171a6/pkg/hub/client/policy_enforced_client.go#L116-L118
- Add unit-tests for all possible merging scenarios.
Add integration test https://github.com/capactio/capact/blob/86f0be8dbe65c3e69620e9a1343ea88e514171a6/test/e2e/action_test.go#L145
- First scenario, ensure that default injection works,
- Second scenario, ensure that it can be overridden with Interface specific injection rule.
Add documentation on website
- Mention that defaults doesn't affect Implementation resolution

capactio / capact

Add common TypeInstance injection #635

Description