Module integration with terraform-ibm-modules org

IBM Cloud-specific modules (those that use the IBM Cloud terraform provider) should be moved into the https://github.com/terraform-ibm-modules org so they can be jointly developed and maintained. The instructions for onboarding a module into the org are provided here - https://github.com/terraform-ibm-modules/getting-started

## Candidate modules

- [ ] ibm-resource-group
- [ ] ibm-vpc
- [ ] ibm-vpc-subnets
- [ ] ibm-vpc-gateways
- [ ] ibm-ocp-vpc
- [ ] ibm-activity-tracker
- [ ] vsi-bastion (should be renamed to ibm-vsi-bastion)
- [ ] ibm-kms-key
- [ ] ibm-access-group
- [ ] ibm-iam-service-authorization
- [ ] ibm-log-analysis
- [ ] ibm-access-group
- [ ] ibm-cloud-monitoring
- [ ] ibm-access-group-bind?
- [ ] ibm-cloud-monitoring-bind?
- [ ] ibm-object-storage
- [ ] ibm-image-registry (should be renamed to ibm-container-registry)
- [ ] ibm-vsi-proxy?
- [ ] ibm-object-storage-bucket
- [ ] ibm-kms
- [ ] ibm-flow-log
- [ ] ibm-vpn-server
- [ ] ibm-vpn-gateway
- [ ] ibm-transit-gateway
- [ ] ibm-vpe-gateway
- [ ] ibm-redis
- [ ] ibm-account-access-group
- [ ] ibm-cert-manager-cert
- [ ] ibm-cert-manager
- [ ] ibm-key-protect
- [ ] ibm-onboard-fs-account
- [ ] ibm-vpc-load-balancer
- [ ] ibm-hpcs
- [ ] ibm-vpc-ssh
- [ ] ibm-hpdbaas-mongodb
- [ ] ibm-hpdbaas-postgresql
- [ ] ibm-vpc-hpvsi
- [ ] ibm-event-streams
- [ ] ibm-event-streams-topic
- [ ] ibm-appid
- [ ] ibm-account-users
- [ ] ibm-watson-studio
- [ ] ibm-watson-assistant
- [ ] ibm-mongodb