Db2 Module Naming & Description

DB2 Modules have gotten a bit confusing. We need to make sure that the modules names and descriptions properly convey the module function. @yogendrasri @RamyaRaghuveera @balasgit can you confirm:

- https://github.com/cloud-native-toolkit/terraform-gitops-db2u-operator
This installs the DB2U operato subscription. I believe this is named correctly, and the PR has been reviewed/merged.

- https://github.com/cloud-native-toolkit/terraform-gitops-cp-db2-oltp
This version installs the Db2oltp operator and creates a `Db2oltpService` instance.
- Is this ready to review? I thought there were still outstanding questions/issues around entitlements, but I don't see it in the discussion.
- Should this be renamed to `terraform-gitops-cp-db2oltpService`?

- https://github.com/cloud-native-toolkit/terraform-gitops-cp-db2
This creates the DB2 **Database** instance. Right?

- The description still says `Module tp populate a gitops repo with the resources to provision db2-schema`, which I believe is incorrect (and is different from the readme). Is this ready to review? I see @seansund has reviewed it, and there are both unanswered questions and suggested changes.

- This should probably be renamed to `terraform-gitops-cp-db2-instance` to make it clear that this provisions a database instance.

- https://github.com/cloud-native-toolkit/terraform-gitops-cp-db2-schema
Once complete, this will apply a schema to an already-created DB2 instance. Correct? It looks like no changes have been committed to this one yet.