Restructure of pester test layout

This restructuring moves tests to a directory name which matches the module
in which the cmdlet resides which should improve the discoverability of a
specific test.
For tests which are not about cmdlets in a module, new directories have been
created to make those tests easier to find as well

test/powershell/Modules/Microsoft.PowerShell.Utility/Get-TraceSource.Tests.ps1

@@ -0,0 +1,6 @@
+Describe "Get-TraceSource" -tags "P1" {
+    It "Should output data sorted by name" {
+        $expected = (Get-TraceSource | Sort-Object Name)
+        Get-TraceSource | Should be $expected
+    }
+}