Adding privacy event tags to each telemetry event. (#2879)

* Adding privacy event tags to each telemetry event.

* Moving Privacy events to Telemetry base, Removing tag values, and fixing namespaces.

* Adding documentation comments to fix style cop errors in release

* UTCReplace_AppSessionGuid boolean property to all C# telemetry events.

* Adding hardcoded version number to boot events.

* Adding reference to telemetry in settings unittest

* Adding Preview Pane events for loading w/ hardcoded version number

* Adding telemetry.h to msi for svg and markdown events

* removing unused explicit interface exception

src/common/ManagedTelemetry/Telemetry/Events/IEvent.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Microsoft.PowerToys.Telemetry.Events
+{
+    public interface IEvent
+    {
+        PartA_PrivTags PartA_PrivTags { get; }
+    }
+}