feat: Multi region support for accelerator

[sebassem]

Overview/Summary

Creates necessary changes to ALZ-PowerShell-Config for Accelerator v2 to support multi-region deployments. Also, includes relevant parameter file for VWAN and hubnetworking module that supports deployments to 2 regions.

Finally, adds notice for the upcoming change to zone redundant configurations by default.

Related Issues/Work Items

Closes #675
Fixes AB#34223

This PR fixes/adds/changes/removes

• Added an additional hubNetworking module for 2-region deployments
• Added an additional parameters file in case multi-region is selected, to deploy both regions
• Updated some parameters' values to include the region to make a clear distinction between them like bastion and nsgs
• Implement vnet peering between the 2 hubs
• Add notice for zone redundant configuration date in Q4 2024.

Breaking Changes

None

Testing Evidence

Replace this with any testing evidence to show that your Pull Request works/fixes as described and planned (include screenshots, if appropriate).

As part of this Pull Request I have

• Read the Contribution Guide and ensured this PR is compliant with the guide
• Ensured the resource API versions in .bicep file/s I am adding/editing are using the latest API version possible
• Checked for duplicate Pull Requests
• Associated it with relevant GitHub Issues
• (ALZ Bicep Core Team Only) Associated it with relevant ADO Items
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Performed testing and provided evidence.
• Updated one or more of the following tests (if required)
  • Unit
  • Linting
  • E2E (End-To-End)
  • ValidateAzCloud (Base validation in Azure Cloud)
  • ValidateMcCloud (Base validation in Azure China Cloud)
• Updated relevant and associated documentation (e.g. Contribution Guide, Module READMEs, Wiki Docs etc.)
• If relevant, created or updated Code Tours here

[jaredfholgate]

Looking good so far, clearly work in progress, so feel free to ignore my comments as you likely have them on your todo list anyway.

[oZakari]

/azp run validateazcloud

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