Nest Interface Policy under the interface field

[mszostok]

Description

Changes proposed in this pull request:

• Nest Interface Policy under the interface field
• Use our Go client to update Policy instead of doing that on raw ConfigMap. The config map update was implemented before we had the GraphQL cli:

  capact/test/e2e/action_test.go

  Line 266 in 05383cd

  func updateClusterPolicyConfigMap(stringToFind, stringToReplace string) func() {

  Currently, it doesn't make sens to use it. It's better to test our client and do that via GraphQL to simulate a real user interaction.
  • For now I decided, to leave it as Global Policy, but IMO it will be good to change it to Action Policy, so the global cluster state won't be changed during executing e2e tests.

NOTE: The easiest way to review is to select "Hide whitespaces".

Related issue(s)

• Add e2e support for setting backend.id (Policy, Workflow, GraphQL) #624

[mkuziemko]

Good work 👍 Some suggestions/questions added.

[mkuziemko]

LGTM 👍