Add nodeAffinity for Postgres operator, and add new entry cloud-native-postgresql-v1.22

[Daniel-Fan]

What this PR does / why we need it:

• When ODLM configures Postgres operator pod with multiple replicas, ODLM will update overwrite the entire Affinity field for Postgres operator CSV/deployment. So the configuration for Postgres Operator should contain necessary nodeAffinity to ensure pods are distributed on nodes with supported architecture.
• Add an new entry for cloud-native-postgresql-v1.22 in OperatorConfig, so the Postgres operator requested via cloud-native-postgresql-v1.22 will get the multi replicas configuration as well.

Which issue(s) this PR fixes:
Fixes https://github.ibm.com/IBMPrivateCloud/roadmap/issues/65071

Test

1. Install dev build of SC2 4.6.x
2. Patch CS operator CSV with image docker-na-public.artifactory.swg-devops.com/hyc-cloud-private-scratch-docker-local/ibmcom/common-service-operator-amd64:dev and ImagePullPolicy: Always
3. Edit CommonService CR to configure multiple Postgres operator replicas

   apiVersion: operator.ibm.com/v3
   kind: CommonService
   metadata:
     name: common-service
   spec:
     license:
       accept: false
     operatorConfigs:
       - name: cloud-native-postgresql
         replicas: 2
     operatorNamespace: sc2-dev
     servicesNamespace: sc2-dev
     size: starterset

4. Create OperandRequest to request cloud-native-postgresql-v1.22
5. Verify the operator pod affinity section matching with what we defined in OperatorConfig

   ➜  ~ oc get pod postgresql-operator-controller-manager-1-22-7-64c7c847d6-l9pgs -ojsonpath='{.spec.affinity}' | jq
   
   {
     "nodeAffinity": {
       "requiredDuringSchedulingIgnoredDuringExecution": {
         "nodeSelectorTerms": [
           {
             "matchExpressions": [
               {
                 "key": "kubernetes.io/arch",
                 "operator": "In",
                 "values": [
                   "amd64",
                   "ppc64le",
                   "s390x"
                 ]
               }
             ]
           }
         ]
       }
     },
     "podAntiAffinity": {
       "preferredDuringSchedulingIgnoredDuringExecution": [
         {
           "podAffinityTerm": {
             "labelSelector": {
               "matchExpressions": [
                 {
                   "key": "app.kubernetes.io/name",
                   "operator": "In",
                   "values": [
                     "cloud-native-postgresql"
                   ]
                 }
               ]
             },
             "topologyKey": "topology.kubernetes.io/zone"
           },
           "weight": 90
         },
         {
           "podAffinityTerm": {
             "labelSelector": {
               "matchExpressions": [
                 {
                   "key": "app.kubernetes.io/name",
                   "operator": "In",
                   "values": [
                     "cloud-native-postgresql"
                   ]
                 }
               ]
             },
             "topologyKey": "kubernetes.io/hostname"
           },
           "weight": 50
         }
       ]
     }
   }

[YCShen1010]

/lgtm

[ibm-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Daniel-Fan, YCShen1010

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