Ensure precompute uses all expected xrefs

[blakesweeney]

A recent help request delt with some sequenes which appeared to be active but cannot be found. Looking into it found this issue. This was caused by a bug I created at some point which imported RNA sequences instead of DNA ones. I fixed it but the fact that those sequences are marked as active in rnc_rna_precompute means there is another bug. Basically, at some point the precompute pipeline should have pulled out xrefs for those UPIs and ensured that rnc_rna_precompte.is_active is false. As that didn't happen there is likely a bug somewhere. One possible solution is to just manually fix these entries, but I'm not sure how big the bug is.

Some things that may be useful, but I'm not sure are required:

• Extract all active upi_taxid from xrefs and all active entries in rnc_rna_precomputed and compare
• Manually fix the incorrect rnc_rna_precomputed entries