Do not skip TestTargetBurstCapacity when dataplane-trust is not spe…

…cified (#14300)

* Do not skip TestTargetBurstCapacity when `dataplane-trust` is not specified

* use empty string

* Use dataplane-trust instead of internal-encryption

* Revert "Use dataplane-trust instead of internal-encryption"

This reverts commit 1acfacc.

* Add deprecated internal-encryption

* Fix

test/e2e/autoscale_test.go

@@ -173,9 +173,11 @@ func TestTargetBurstCapacity(t *testing.T) {
 	if err != nil {
 		t.Fatal("Fail to get ConfigMap config-network:", err)
 	}
-	if !strings.EqualFold(cm.Data[netcfg.DataplaneTrustKey], string(netcfg.TrustDisabled)) {
-		// TODO: Remove this when https://github.com/knative/serving/issues/12797 was done.
-		t.Skip("Skipping TestTargetBurstCapacity as activator-ca is specified. See issue/12797.")
+
+	// TODO: Remove this when "activator always stay in path" is eliminated.
+	dataplaneTrustMode := cm.Data[netcfg.DataplaneTrustKey]
+	if (dataplaneTrustMode != "" && !strings.EqualFold(dataplaneTrustMode, string(netcfg.TrustDisabled))) || strings.EqualFold(cm.Data[netcfg.InternalEncryptionKey], "true") {
+		t.Skip("Skipping TestTargetBurstCapacity as activator always stay in path.")
 	}
 
 	cfg, err := autoscalerCM(ctx.clients)