Summary

• Adds a webhook server that validates the blueprint spec. It also adds a default webhook so that the user can skip some parameter specs

Checklist

• Categorize the PR by setting a good title and adding one of the labels:
  kind:bug, kind:enhancement, kind:documentation, kind:change, kind:breaking, kind:dependency
  as they show up in the changelog
• PR contains the label area:operator
• Link this PR to related issues
• I have not made any changes in the charts/ directory.