enable public access for the storage account in blob live test (#25598)

Author: yifanz7

src/Storage/Storage.Management.Test/LiveTests/BlobTests.ps1

@@ -10,7 +10,7 @@ Invoke-LiveTestScenario -Name "Blob basics" -Description "Test blob basic operat
     $ContentMD5 = "i727sP7HigloQDsqadNLHw=="
     $testfile512path = "$PSScriptRoot\TestFiles\testfile512"
 
-    $account = New-AzStorageAccount -ResourceGroupName $rgName -Name $storageAccountName -Location $location -SkuName Standard_GRS
+    $account = New-AzStorageAccount -ResourceGroupName $rgName -Name $storageAccountName -Location $location -SkuName Standard_GRS -AllowBlobPublicAccess $true
     $ctx = $account.Context
     $container = New-AzStorageContainer -Name $containerName -Context $ctx
     $containerSAS = New-AzStorageContainerSASToken -Name $containerName -Permission radwl -ExpiryTime 5000-01-01 -Context $ctx