[Windows] Implement new directories hierarchy (#8616)

images/windows/scripts/tests/SSDTExtensions.Tests.ps1

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+Describe "SSDTExtensions" {
+#These extensions don't have any proper name in the state.packages.json file, only id is available, which can be found on extension marketplace download page
+
+    if (Test-isWin19) {
+      $testExtenions = @(
+      @{id = "04a86fc2-dbd5-4222-848e-911638e487fe"}
+      @{id = "851E7A09-7B2B-4F06-A15D-BABFCB26B970"}
+      @{id = "717ad572-c4b7-435c-c166-c2969777f718"}
+      )
+
+      It "Extensions id=<id>" -TestCases $testExtenions {
+        $version = Get-VSExtensionVersion -packageName "${id}"
+        $version | Should -Not -BeNullOrEmpty
+      }
+    } else {
+      It "Extension SSDT" {
+        $version = Get-VSExtensionVersion -packageName "SSDT"
+        $version | Should -Not -BeNullOrEmpty
+      }
+    }
+}