[Fixes] Update remaining API for networking resources

[MariusStorhaug]

Description

• vpn-gateway/nat-rule (2022-07-01) -> (2023-04-01)
• vpn-gateway/vpn-connection (2022-07-01) -> (2023-04-01)
  • New parameter: dpdTimeoutSeconds
• virtual-network-gateway/nat-rule (2022-07-01) -> (2023-04-01)
• virtual-network/subnet (2022-07-01) -> (2023-04-01)
  • New API, new casing:
    
  • Update subnet reference in constructs
• network-security-group/security-rule (2022-07-01) -> (2023-04-01)
• load-balancer/backend-address-pool (2022-07-01) -> (2023-04-01)
  • New parameter: syncMode
• load-balancer/inbound-nat-rule (2022-07-01) -> (2023-04-01)
  • tests updated that were deploying load-balancer/inbound-nat-rule
    • network/network-interface
• firewall-policy/rule-collection-group (2022-07-01) -> (2023-04-01)

Pipeline references

Pipeline

Type of Change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Update to documentation

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (readme)
• I did format my code

[MariusStorhaug]

Just doing a full regen of ARM/json and readme to be sure i didn't miss anything.

[MariusStorhaug]

@ahmadabdalla Should be all good now. I will run the pipelines w/o validation deployments again just to check. Feel free to merge if you don't need to wait for that, as it would be just as fine running in Azure/ResourceModules repo.