Migrate infra-public-wafs from govuk-aws

[theseanything]

This is the initial step to migrating infra-public-wafs from govuk-aws.

aws_wafv2_web_acl_logging_configuration need to be manually imported, as the terraform provider doesn't support the data objects for retrieving the "ids".

[samsimpson1]

I assume you're planning on using terraform import commands for the logging config, that will probably be fine but if not you could do something similar to what I had to do for the CSP reporter and create a list of the ID for each env

https://github.com/alphagov/govuk-infrastructure/blob/c3e15189a19c6f31474d2228ac0160fd9b2fd7b7/terraform/deployments/csp-reporter/imports.tf