hifiasm: output noseq.gfa files as collection

[abueg]

👋🏼 !

I have edited the hifiasm xml to output the noseq.gfa files as a collection. I have added a line at the end of the tool's command to make a noseq folder and put the noseq files in there. They are small files (they're the GFAs minus the actual sequence, so much smaller) so I have them output by default.

[bgruening]

LGTM! Do you think you need that output by default?

[abueg]

I think it'd be useful as default -- the noseq files are better for users to download for visualization/manipulation/sharing because of their smaller size

[bgruening]

Then lets get this in!