Add Azure E2E tests

.github/workflows/e2e-azure.yaml

tests/.gitignore

tests/azure/README.md

tests/azure/azure_test.go

tests/azure/go.mod

tests/azure/go.sum

tests/azure/terraform.go

tests/azure/terraform/aks/.terraform.lock.hcl

tests/azure/terraform/aks/aks.tf

tests/azure/terraform/aks/azuredevops.tf

tests/azure/terraform/aks/event-hub.tf

tests/azure/terraform/aks/keyvault.tf

tests/azure/terraform/aks/main.tf

tests/azure/terraform/aks/outputs.tf

tests/azure/terraform/aks/service-principal.tf

tests/azure/terraform/aks/shared.tf

tests/azure/terraform/shared/.terraform.lock.hcl

tests/azure/terraform/shared/acr.tf

tests/azure/terraform/shared/keyvault.tf

tests/azure/terraform/shared/main.tf