[Windows] Implement new directories hierarchy (#8616)

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

@@ -0,0 +1,10 @@
+Describe "Clang/LLVM" {
+    BeforeAll {
+        $toolsetVersion = (Get-ToolsetContent).llvm.version
+    }
+
+    It "Clang/LLVM <toolsetVersion> installed and version is correct" {
+        $clangVersion = clang --version
+        $clangVersion[0] | Should -BeLike "*${toolsetVersion}*"
+    }
+}