Split out ingestion scripts into covid19-ingestion

[abhidg]

Currently globaldothealth/list contains covid-19 ingestion scripts. With #2712, we'll no longer be catering to only one disease, so it makes sense to move ingestion scripts into separate repo, one for each for disease/pathogen.

[jim-sheldon]

This is related to https://github.com/globaldothealth/monkeypox/issues/21, insofar as we need one generic script for any new disease.

[abhidg]

We'll need multiple scripts in general as government sources will not follow our schema.

[iamleeg]

An alternative to consider: move covid-19 ingestion scripts to ingestion/functions/covid-19, and add a new folder ingestion/functions/monkeypox or whatever.

Benefits:

• keeping scripts and platform in the same repo means they are version controlled together so it is more work to try to deploy scripts that are incompatible with the API.
• reduces the number of places you have to go for information on how the system works.

Drawbacks:

• mixes generic "this is a platform for health data science" and specific "this is information about how the platform is used for H1N1" information in one place.
• potentially makes for very long deployment pipelines if there are tests for all the ingestion scripts for multiple pathogens (which of course there are cough)

[abhidg]

Not a priority right now, will re-open when we are setting up new turnkey system.