Maintenance of VPC module

[tpdownes]

• update to CFT Cloud Router module 2.0
• add support for custom firewall rules
• optionally enable/disable default firewall rules
• add support for secondary IP ranges in VPC as "passthrough" variable
• update documentation to direct users for information on detailed structure of the complex object/map variables

I have manually tested the hpc-small.yaml example and observed that the default firewall rules are still created. I have also manually submitted integration group 4 build and observed success. I believe only groups 3 and 4 test this module's functionality.

Submission Checklist

• Have you installed and run this change against pre-commit? (pre-commit install)
• Are all tests passing? (make tests)
• Have you written unit tests to cover this change?
• Is unit test coverage still above 80%?
• Have you updated all applicable documentation?
• Have you followed the guidelines in our Contributing document?

[tpdownes]

One of your comments prompted a real change to keep the distinct firewall_rules module until we adopt Terraform 1.1+. While doing this, addressed the nits. The real change required re-writing the git history so there is a force push here. Hopefully conversations not too impacted.