chore: DB2 root no-squash on ROKS

[nastacio]

Closes: #26

Description of changes:

• Apply missing cluster configuration change from https://www.ibm.com/docs/en/cloud-paks/cp-biz-automation/21.0.x?topic=deployment-installing-capabilities-in-operator-hub

Output of argocd app list command or screenshot of the ArgoCD Application synchronization window showing successful application of changes in this branch.

Verified on both OCP 4.6 and 4.7 with latest patches.

argocd app list | grep cp4a-
cp4a-app                https://kubernetes.default.svc  ibm-cloudpaks     default  Synced     Healthy  Auto-Prune  <none>      https://github.com/IBM/cloudpak-gitops.git  config/argocd-cloudpaks/cp4a                       26-root-no-squash
cp4a-operators          https://kubernetes.default.svc  ibm-cloudpaks     default  Synced     Healthy  Auto        <none>      https://github.com/IBM/cloudpak-gitops.git  config/cloudpaks/cp4a/operators                    26-root-no-squash
cp4a-resources          https://kubernetes.default.svc  ibm-cloudpaks     default  Synced     Healthy  <none>      <none>      https://github.com/IBM/cloudpak-gitops.git  config/cloudpaks/cp4a/resources                    26-root-no-squash