[terraform-ibm-watsonx-self-managed-ocp] Set up renovate to bump versions

Number of versions that need to be bumped such as:

[odf_version](https://github.com/terraform-ibm-modules/terraform-ibm-cloudpak-data/blob/main/solutions/deploy/variables.tf#L81) and [cpd_version](https://github.com/terraform-ibm-modules/terraform-ibm-cloudpak-data/blob/main/solutions/deploy/variables.tf#L138C11-L138C22).