TraceParserGen does NOT support field type "win:SID"

In Windows 10 Update 1903, the "Microsoft-Windows-Kernel-Process" manifest was updated, and a new type "win:SID" was introduced.
This type is of variable length, it is a simple security identifier.

TraceParserGen has an internal "SkipSID" method, which is misleading, because it is actually a "SkipTokenUserAndSID", or "SkipWBEMSID".

A correct implementation of SkipSID is:

		internal int SkipSID(int offset)
		{
			// This is a Security Token.  Either it is null, which takes 4 bytes,
			// Otherwise it is an SID, which is variable size (sigh) depending on the 2nd byte in the SID
			int sid = GetInt32At(offset);
			if (sid == 0) return offset + 4;

			// 8 bytes for the SID (1 byte revision, 1 byte authorities count, 6 bytes identifier authority)
			int numAuthorities = GetByteAt(offset + 1); // Each authority is 4 bytes long
			return offset + 8 + 4 * numAuthorities;
		}

Start in TraceParserGen by locating the existing SkipSID method and compare its behavior with the win:SID description in this issue. Verify handling of null and variable-length security identifiers, then confirm that Microsoft-Windows-Kernel-Process traces using win:SID are parsed correctly without breaking existing token handling.