Enable VGNC xrefs for 15 more species

Created by: mkszuba

Description

xref_config.ini: enable VGNC xrefs for pig (full gene set) and 14 more new species (cytochrome P450 only)

Use case

As requested by VGNC.

Benefits

More species with VGNC xrefs.

Possible Drawbacks

Increased run time of the xref pipeline. Species from commit 3eb69e91 may or may not prove problematic.

Testing

Have you added/modified unit tests to test the changes?

No.

If so, do the tests pass/fail?

N/A

Have you run the entire test suite and no regression was detected?

No, there aren't any xref-pipeline tests in the test suite.