ci-automation/vendor-testing/azure: Allow passing kola vnet

This adds support for providing a value for the newly introduce
--azure-kola-vnet kola parameter through the environment. This parameter is
meant to indicate that kola is running inside of a vnet in Azure and the kola
created storage account will be restricted to being accessed from that vnet.
This lets us disable public access to storage accounts.

Needs a corresponding change to jenkins jobs, because we have no way of
determining what vnet a worker node is connected to programmatically. So it
needs to be defined by the job.

Signed-off-by: Jeremi Piotrowski <jpiotrowski@microsoft.com>

ci-automation/ci-config.env

@@ -149,6 +149,7 @@ AWS_PARALLEL="${PARALLEL_TESTS:-8}"
 : ${AZURE_amd64_MACHINE_SIZE:="Standard_D2s_v4"}
 : ${AZURE_arm64_MACHINE_SIZE:="Standard_D2pls_v5"}
 : ${AZURE_USE_GALLERY:=""}
+: ${AZURE_KOLA_VNET:=""}
 : ${AZURE_USE_PRIVATE_IPS:=true}
 : ${AZURE_VNET_SUBNET_NAME:="jenkins-vnet-westeurope"}
 AZURE_PARALLEL="${PARALLEL_TESTS:-20}"

ci-automation/vendor-testing/azure.sh

@@ -56,6 +56,7 @@ run_kola_tests() {
       --azure-size="${instance_type}" \
       --azure-hyper-v-generation="${hyperv_gen}" \
       ${AZURE_USE_GALLERY} \
+      ${AZURE_KOLA_VNET:+--azure-kola-vnet=${AZURE_KOLA_VNET}} \
       ${azure_vnet_subnet_name:+--azure-vnet-subnet-name=${azure_vnet_subnet_name}} \
       ${AZURE_USE_PRIVATE_IPS:+--azure-use-private-ips=${AZURE_USE_PRIVATE_IPS}} \
       "${@}"