FIX: Missing Parameters in Function App result in failed execution

[Especially]

PR Checklist

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• 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

There is currently configurations missing for IP Restriction rules that exist for the SCM IP Restriction Rules, as a result we see an error that gets thrown via Terraform and an apply cannot be done.

2025-02-14T15:45:13.5562971Z Error: expanding `site_config` for Function App "APP" (Resource Group "rg"): one of `ip_address`, `service_tag` or `virtual_network_subnet_id` must be set for an IP restriction
2025-02-14T15:45:13.5563279Z 
2025-02-14T15:45:13.5563615Z   with module.caf.module.function_apps["APP"].azurerm_function_app.function_app,
2025-02-14T15:45:13.5564133Z   on .terraform/modules/caf/modules/webapps/function_app/module.tf line 12, in resource "azurerm_function_app" "function_app":
2025-02-14T15:45:13.5564754Z   12: resource "azurerm_function_app" "function_app" {

Does this introduce a breaking change

• YES
• NO

Testing