Support creation of CDP DW Database Catalog and Virtual Warehouses

[raju-saravanan]

Changes in this PR:

• Make changes in the existing DW module to support private load balancers.
• Expose a new module for the creation of DW database catalog.
• Expose a new module for the creation of DW virtual warehouse.

Changes in this PR are done in conjunction with the following PRs:

• Deploy : https://github.com/cloudera-labs/cloudera-deploy/pull/46
• Exe : https://github.com/cloudera-labs/cloudera.exe/pull/27
• Cloud : https://github.com/cloudera-labs/cloudera.cloud/pull/19

[Chaffelson]

Can you push with DCO please @raju-saravanan