define metadata ontologies

[adamcantor22]

Is your feature request related to a problem? Please describe.
There is no standard for several of our metadata columns, leading to many columns describing the same thing in different ways. In order for MMEDS to be an effective meta-analysis tool, we need to standardize these disparate categories to established ontologies.

Describe the solution you'd like
Enforce the following ontologies into the metadata:

• ENVO
• EMP
• GAZ
• UBERON
• ISO 8601
• "Missing" values from Qiimp

There should also be a check across AdditionalMetaData table columns to ensure that users are not using those columns in lieu of columns that already exist.