feat: remove http based file ingest

[jennifer-bowser]

closes #103

[jsstevenson]

I know this is leftover code, but there are a few things that I think we should not carry over from the previous endpoint

1. file size limit -- the current max is too low to really be usable anyway, but I don't think a CLI needs to enforce a file size limit on itself. Since this is non-public, there's no reason why we need to be defensive against ourselves.
2. validate gzip -- pysam can also read non-gzipped VCFs just fine, I don't think we should be introducing additional validation beyond what it thinks it can handle (ditto for the filename).
3. the _raise_vcf_ingestion_error function -- I think this might be an unnecessary additional layer, in several cases it is re-logging exceptions that have already been logged, and also makes the stack trace that prints to the console even longer.
   • with respect to point # 2 above -- pysam will raise a ValueError if you try to give it an unreadable file. I think we should be catching this, logging, and reraising it directly in the service function instead of doing a big catch block in the CLI

[jsstevenson]

🚀