Migrate GBIF from etl

[pjhartzell]

Description

Adds the Global Biodiversity Information Facility (GBIF) dataset.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Created and ingested all 25 Items into PC Test
• Checked for equivalence to production Items by diffing an Item from the production API against one produced with this PR.

Checklist:

Please delete options that are not relevant.

• I have performed a self-review
• Changelog has been updated
• Documentation has been updated
• Unit tests pass locally (./scripts/test)
• Code is linted and styled (./scripts/format)

[TomAugspurger]

Small comment, otherwise LGTM.

[TomAugspurger]

Thanks!