Add CRD validation (#599)

* add CRD manifests with validation
* update documentation
* patroni slots is not an array but a nested hash map
* make deps call tools
* cover validation in docs and export it in crds.go
* add toggle to disable creation of CRD validation and document it
* use templated service account also for CRD-configured helm deployment

delivery.yaml

@@ -28,7 +28,7 @@ pipeline:
               IMAGE=registry-write.opensource.zalan.do/acid/postgres-operator-test
             fi
             export IMAGE
-            make tools deps docker
+            make deps docker
         - desc: 'Run unit tests'
           cmd: |
             export PATH=$PATH:$HOME/go/bin