Provide basic integration/acceptance/e2e tests for Asset Store

[derberg]

Description

• have test that tests Asset and Bucket at the same time
• webhook services are out of scope for now
• test is runnable also as a part of the CI upgradability plan so we know that after upgrade asset store still works
• we basically
  • create a Bucket,
  • create an Asset for newly created bucket
  • asset refers to Kyma release or you can wait for Provide an local upload service for asset store #2653 and upload some test data there (advantage is that upload service will be also tested with this scenario)
  • the asset is uploaded to Minio and we make sure it is really there where the status points

Stretch goal:

• best case scenario would be if that would be tasted in Minio Gateway mode -> only if it doesn't exceed initial estimation (investigate what to do to accomplish this task)

Reasons

• we need basic e2e coverage that checks core functionalities happy paths