Operator continuously updates Bucket when using magma storage backend

The operator continuosly updates the bucket when a bucket is using magma.

This causes noisey logs and unnecesary calls to cb-server

Example yaml:

apiVersion: couchbase.com/v2
kind: CouchbaseBucket
metadata:
  name: default
spec:
  storageBackend: "magma"
  memoryQuota: 1024Mi
  evictionPolicy: fullEviction
---
apiVersion: couchbase.com/v2
kind: CouchbaseCluster
metadata:
  name: cb-example
spec:
  image: couchbase/server:7.2.0
  security:
    adminSecret: cb-example-auth
    rbac:
      managed: true
  buckets:
    managed: true
  servers:
    - size: 3
      name: all_services
      services:
        - data
        - index
        - query
        - search
        - eventing
        - analytics
  cluster:
    dataServiceMemoryQuota: 1512Mi