[Bug - vwanConnectivity] outAzFwPrivateIps output index error

[sebassem]

Overview/Summary

When adding multiple hubs with different firewall configuration, the array reference of the outAzFwPrivateIps output seems to be not correct with the following error. If the hubs have the same firewall configuration, this error doesn't seem to appear.

This PR fixes/adds/changes/removes

Fixes #786

Testing Evidence

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

[oZakari]

Good catch @sebassem and thanks for the PR!!

[oZakari]

/azp run validateazcloud

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