tdb/vidrl_upload: Improve human serum reference parsing

[joverlee521]

We've run into instances where the human serum reference rows are not in the expected order, which leads to an error. See example in confluence docs.

The parser should be able to handle matching the human serum references even if the header rows are in a different order. Likely needs to be an improvement in find_serum_rows or parse_human_serum_references