Add One Health Enteric BioSample Package + misc bugfixes

[erikwolfsohn]

Hi! I just found out about this fantastic submission pipeline you all built and I'm really excited to start using it. I had to make some updates since the majority of my NCBI submissions are enteric pathogens, so figured I'd submit a pull request in case any of these changes can be useful for you all.

📋 Updates

• Added all mandatory and optional metadata fields for the One Health Enteric BioSample Package to main_config.yaml
• Added a template and config file for BioSample & SRA submission using that package
• Changed some handling to remove optional columns if left blank before submission

🛠️ Fixes

• Slightly modified the behavior of the check_submission_status workflow to prevent FTP navigation errors/query errors.
• Slightly modified handling for input arguments so users shouldn't be prompted for FASTA input unless they're submitting to Genbank or GISAID
• Changed handling for mandatory vs optional columns; the pipeline should no longer require optional columns in metadata.csv prior to submission