Capture and pass diagnostic settings to sub modules\resources.

### Check for previous/existing GitHub issues

- [x] I have checked for previous/existing GitHub issues

### Issue Type?

Feature Request

### (Optional) Module Version

_No response_

### (Optional) Correlation Id

_No response_

### Description

Unable to set diagnostic settings to the sub resources that are created.
Eg:
- virtual network
- firewall policy
- firewall (even thought the internal module has a variable for it, the main TF doesn't capture any variables and therefore doesn't pass anything to it

Thanks and keep up the good work :)

No files or tests are named. Start by tracing the main Terraform module and its internal module variables for diagnostic settings, then inspect how virtual network, firewall policy, and firewall resources are created; done means the main module captures and passes the settings to those sub-resources.

Written by the indexing model from the issue text.