chore(server): split gcloud sql proxy into a separate deployment (#5101)

After merge this pull request, need to change the `DATABASE_URL` in environment secrets (stable/beta) from `127.0.0.1` to `affine-cloud-sql-proxy`

.github/helm/affine/charts/sync/templates/deployment.yaml

@@ -82,20 +82,6 @@ spec:
             initialDelaySeconds: {{ .Values.probe.initialDelaySeconds }}
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
-        {{ if .Values.global.database.gcloud.enabled }}
-        - name: cloud-sql-proxy
-          image: gcr.io/cloud-sql-connectors/cloud-sql-proxy:2.6.0
-          args:
-            - "--structured-logs"
-            - "--auto-iam-authn"
-            - "{{ .Values.global.database.gcloud.connectionName }}"
-          securityContext:
-            runAsNonRoot: true
-          resources:
-            requests:
-              memory: "2Gi"
-              cpu:    "1"
-        {{ end }}
       {{- with .Values.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}