Exclude specific backends from pruning (#262)

* Skip backends while pruning

* Add pruning test step and silence download log for better readability

* Add test cases for pruning in all backends

Also add -q or --quiet-pull to all tests.

* Add test case for skipping backends while pruning

* Adjusted test logging, generate new test spec file

* Gitignore for temp test file

test/dropbox/docker-compose.yml

@@ -9,7 +9,7 @@ services:
     ports:
       - 8080:8080
     volumes:
-      - ./user_v2.yaml:/etc/openapi/user_v2.yaml
+      - ./user_v2_ready.yaml:/etc/openapi/user_v2.yaml
 
   oauth2_mock:
     image: ghcr.io/navikt/mock-oauth2-server:1.0.0