feat: ptn/virtual-wan Parameter & API updates

[ericscheffler]

Changes
Added virtualRouterAutoScaleConfiguration parameter to virtualHubParameterType to support configuring Virtual Hub capacity (Routing Infrastructure Units). This maps to the portal's Virtual hub capacity setting and controls the hub router's throughput and VM support (minCount of 2 = 3 Gbps / 2000 VMs).

Updated module references to latest versions:

• avm/res/network/azure-firewall: 0.10.0 → 0.10.1
• avm/res/network/vpn-server-configuration: 0.1.2 → 0.2.0
• avm/res/network/p2s-vpn-gateway: 0.1.3 → 0.1.4

Breaking Changes
None. All changes are additive — the new parameter is optional.

Fixes #6943
Closes #6943

Pipeline Reference

Type of Change

• Azure Verified Module updates:
  • Bugfix containing backwards-compatible bug fixes, and I have NOT bumped the MAJOR or MINOR version in version.json:
  • Feature update backwards compatible feature updates, and I have bumped the MINOR version in version.json.
  • Breaking changes and I have bumped the MAJOR version in version.json.
  • Update to documentation
• Update to CI Environment or utilities (Non-module affecting changes)

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• I have run Set-AVMModule locally to generate the supporting module files.
• My corresponding pipelines / checks run clean and green without any errors or warnings
• I have updated the module's CHANGELOG.md file with an entry for the next version

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