relative optional parameter will now be handled by setting the RelativeName of the relative struct to NT converted and collapsed relative path and the ContainingDirectory to an open handle of current working directory. CurDir is currently not implemented.
-- v2: ntdll: Implement handling of relative parameter for RtlDosPathNameToRelativeNtPathName_U_WithStatus ntdll/tests: Add tests to verify relative pathname and container directory filling. Also additional entries to test more relative pathname cases