fix: update scale test sku (#2357)

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Signed-off-by: Alex Castilio dos Santos <alexsantos@microsoft.com>

Author: alexcastilio

test/e2e/framework/azure/skus.go

@@ -3,7 +3,7 @@ package azure
 import "os"
 
 var (
-	AgentLinuxSKU    = skuFromEnv("AZURE_AGENT_LINUX_SKU", "Standard_D4ds_v4")
+	AgentLinuxSKU    = skuFromEnv("AZURE_AGENT_LINUX_SKU", "Standard_D4ds_v3")
 	AgentLinuxARMSKU = skuFromEnv("AZURE_AGENT_LINUX_ARM_SKU", "Standard_D4pds_v5")
 	AgentWindowsSKU  = skuFromEnv("AZURE_AGENT_WINDOWS_SKU", "Standard_D4ds_v4")
 )