Added support for aws waf v2

[robertdeheer]

Description

Please describe what this change achieves. Ensure you have read the Contributing to InSpec AWS document before submitting.

Issues Resolved

List any existing issues this PR resolves, or any Discourse or StackOverflow discussion that's relevant

Check List

Please fill box or appropriate ([x]) or mark N/A.

• [ ] New functionality includes integration tests/controls
• [ ] New Terraform resources
• [ ] Documentation provided or updated for resources
• [ ] All Integration Tests pass
• [ ] All Unit Tests pass
• [ ] rake lint passes
• [x] All commits have been signed-off for the Developer Certificate of Origin. See https://github.com/chef/chef/blob/master/CONTRIBUTING.md#developer-certification-of-origin-dco

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[aaronlippold]

Given our recent updates to main and the train-aws v0.4.2 release you should be able to pull in upstream/main and your PR should hopefully pass to the next stage as the aws_sdk_wafv2 gem is now in train-aws.

[aaronlippold]

If you want to get this passing for now - add the needed gem to the Gemfile and this should get moving again.

[aaronlippold]

Documentation for the resources - which is likely a 'mostly copy' from the v1 docs - seems to be missing.