[cluster-autoscaler-release-1.27] backport Azure e2e tests

[nojnhuh]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Manual cherry-pick of #7204:

This PR backports the Azure e2e tests added by #6969 and related PRs to the master branch.

This is exactly the same as #7246 + these changes:

diff --git a/cluster-autoscaler/cloudprovider/azure/test/e2e/e2e_suite_test.go b/cluster-autoscaler/cloudprovider/azure/test/e2e/e2e_suite_test.go
index a0d4a3a49..2505d23ec 100644
--- a/cluster-autoscaler/cloudprovider/azure/test/e2e/e2e_suite_test.go
+++ b/cluster-autoscaler/cloudprovider/azure/test/e2e/e2e_suite_test.go
@@ -102,6 +102,7 @@ var _ = BeforeSuite(func() {
 				},
 			},
 		},
+		"azureVMType": "vmss",
 		"autoDiscovery": map[string]interface{}{
 			"clusterName": clusterName,
 		},
diff --git a/cluster-autoscaler/cloudprovider/azure/test/templates/cluster-template-prow-aks-aso-cluster-autoscaler.yaml b/cluster-autoscaler/cloudprovider/azure/test/templates/cluster-template-prow-aks-aso-cluster-autoscaler.yaml
index 4f06fb38e..e6dec7097 100644
--- a/cluster-autoscaler/cloudprovider/azure/test/templates/cluster-template-prow-aks-aso-cluster-autoscaler.yaml
+++ b/cluster-autoscaler/cloudprovider/azure/test/templates/cluster-template-prow-aks-aso-cluster-autoscaler.yaml
@@ -49,6 +49,10 @@ spec:
           enabled: true
       servicePrincipalProfile:
         clientId: msi
+      sku:
+        name: Base
+        tier: Premium
+      supportPlan: AKSLongTermSupport
       tags:
         buildProvenance: ${BUILD_PROVENANCE}
         creationTimestamp: ${TIMESTAMP}

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[nojnhuh]

1.27 is now only available through LTS.

[Bryce-Soghigian]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Bryce-Soghigian, nojnhuh

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Needs approval from an approver in each of these files:

• cluster-autoscaler/cloudprovider/azure/OWNERS [Bryce-Soghigian]

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