Adding public ip prefixes

[heintonny]

Issue-id

PR Checklist

---

• I have added example(s) inside the [./examples/] folder
• I have added the example(s) to the integration test list for normal (~30 minutes) or long runner >30 minutes
• I have checked the coding conventions as per the wiki
• I have checked to ensure there aren't other open Pull Requests for the same update/change?

Description

Created module for public ip prefix and logic to reference public ip prefix from remote states.

Does this introduce a breaking change

• YES
• NO

Testing

Created example configuration networking/pip_prefix and updated standalone-scenarios.json.

[arnaudlh]

Added:

1. FMT
2. Example variables
3. Refactored the resource locator for public ip address to be more reliable at plan time:

 public_ip_prefix_id        = can(each.value.public_ip_prefix.key) ? local.combined_objects_public_ip_prefixes[try(each.value.public_ip_prefix.lz_key, local.client_config.landingzone_key)][each.value.public_ip_prefix.key].id : try(each.value.public_ip_prefix_id, null)

[arnaudlh]

thanks for your contributation to CAF @heintonny and BlinQ AS!