Add non-persistent HNS network support for ACI

[behzad-mir]

Summary

Enable the EnableNonPersistent flag for all HNS v2 networks created via the CNI network package. This ensures networks are automatically removed after host reboot, preventing stale network accumulation.

Changes

Modified configureHcnNetwork() in network_windows.go to set hcn.EnableNonPersistent on all HCN networks
Refactored the FrontendNIC (transparent network) path to use |= for flag combination

Motivation

HNS networks that persist across reboots can accumulate and cause issues. By making all networks non-persistent, we ensure clean state after host restarts.

Test

The Test shows Flags: 8 for the HCN network in non-persistant.

ActivityId             : 43B2A68F-19B5-4322-9D1F-3EB1385C2F0F
AdditionalParams       :
CurrentEndpointCount   : 1
Extensions             : {@{Id=E7C3B2F0-F3C5-48DF-AF2B-10FED6D72E7A; IsEnabled=False; Name=Microsoft Windows Filtering Platform}, @{Id=F74F241B-440F-4433-BB28-00F89EAD20D8; IsEnabled=True; Name=Microsoft Azure VFP Switch Extension},
                         @{Id=430BDADD-BAB0-41AB-A369-94B67FA5BE0A; IsEnabled=True; Name=Microsoft NDIS Capture}}
Flags                  : 8
Health                 : @{LastErrorCode=0; LastUpdateTime=134219707288520535}
ID                     : 333813B5-4CCC-47C4-8901-83BC65777196
IPv6                   : False
LayeredOn              : 92469209-8B69-480F-AF7B-D80FCF9FC0F6
MacPools               : {@{EndMacAddress=00-15-5D-9C-DF-FF; StartMacAddress=00-15-5D-9C-D0-00}}
ManagementIP           : 10.0.0.4
MaxConcurrentEndpoints : 1
Name                   : byovnetbridge-vlan1-172-16-1-0_24
NetworkAdapterName     : Ethernet 2
Policies               : {}
State                  : 1
Subnets                : {@{AdditionalParams=; AddressPrefix=172.16.1.0/24; Flags=0; GatewayAddress=172.16.1.1; Health=; ID=7BFEDF51-A65A-45B6-9DBD-0AE88822D8F3; IpSubnets=System.Object[]; ObjectType=5; Policies=System.Object[];
                         State=0}}
TotalEndpoints         : 1
Type                   : L2Bridge
Version                : 55834574851
Resources              : @{AdditionalParams=; AllocationOrder=0; CompartmentOperationTime=0; Flags=0; Health=; ID=43B2A68F-19B5-4322-9D1F-3EB1385C2F0F; PortOperationTime=0; State=1; SwitchOperationTime=0; VfpOperationTime=0;
                         parentId=4C4AF374-8BC5-4D68-A7EC-7D6977AEEE5C

[daschott]

lgtm