create CDC event stream CRD (#1570)

* provide event stream API
* check manifest settings for logical decoding before creating streams
* operator updates Postgres config and creates replication user
* name FES like the Postgres cluster
* add delete case and fix updating streams + update unit test
* check if fes CRD exists before syncing
* existing slot must use the same plugin
* make id and payload columns configurable
* sync streams only when they are defined in manifest
* introduce applicationId for separate stream CRDs
* add FES to RBAC in chart
* disable streams in chart
* switch to pgoutput plugin and let operator create publications
* reflect code review and additional refactoring

Co-authored-by: Paŭlo Ebermann <paul.ebermann@zalando.de>

manifests/postgresql.crd.yaml

@@ -472,6 +472,39 @@ spec:
                     type: string
                   gs_wal_path:
                     type: string
+              streams:
+                type: array
+                nullable: true
+                items:
+                  type: object
+                  required:
+                    - applicationId
+                    - database
+                    - tables
+                  properties:
+                    applicationId:
+                      type: string
+                    batchSize:
+                      type: integer
+                    database:
+                      type: string
+                    filter:
+                      type: object
+                      additionalProperties:
+                        type: string
+                    tables:
+                      type: object
+                      additionalProperties:
+                        type: object
+                        required:
+                          - eventType
+                        properties:
+                          eventType:
+                            type: string
+                          idColumn:
+                            type: string
+                          payloadColumn:
+                            type: string
               teamId:
                 type: string
               tls: