Support Address space update on peered VNET - Update VirtualNetwork from v1api20201101

[SaschaJohn]

Describe the current behavior
adding addressPrefixes in an existing VNet with peerings results in an error
MinimumApiVersionNotSpecifiedForAddressSpaceUpdateInPeeredVnet

Address space update operation on virtual network can not be performed as the minimum required API version for working with Vnet Peering is 2021-01-01, and the provided client API version is 2020-11-01.: PUT https://management.azure.com/subscriptions/.../resourceGroups/rg-aks/providers/Microsoft.Network/virtualNetworks/vnet-aks-001

Describe the improvement
Update API version for VirtualNetwork from current v1api20201101 to min v1api20210101

[theunrepentantgeek]

Latest stable version appears to be 2023-11-01.

[matthchr]

I think there's a 2024-01-01. I noticed this was way out of date when doing work on #4119. I can take this one and try to get it in for 2.10.

I think Networking has changed the way they version their APIs so that every resource is in every API version, which makes it way easier to keep things up to date because you can just update everything to the latest version rather than having to manually figure out if there was a new version published for every resource type.

[matthchr]

https://github.com/Azure/azure-rest-api-specs/tree/main/specification/network/resource-manager/Microsoft.Network/stable/2024-03-01 exists now