Add/generic vector ingests

[paridhi-parajuli]

Summary: Refactor code to support vector data ingest
Addresses Issue

Changes

• Generalized code for vector data ingest and removed eis-related functionalies.
• Change default value for EXTERNAL_ROLE_ARN passed to the vector ingest ECS
• Add configs for loading data into features database
• Add function to assume AWS IAM role and return temporary credentials

PR Checklist

• Update CHANGELOG
• Unit tests
• Ad-hoc testing - Deploy changes and test manually
• Integration tests

[slesaad]

Looks good to me. @amarouane-ABDELHAK , @smohiudd , @ranchodeluxe , you guys ok with merging this?

[smohiudd]

I just added some general comments on documentation. The way the original EIS vector dag is labelled it's hard to know the difference between that and the generic. So in the docs would be good to be specific that the ingest_vector DAG has logic that is tailored to EIS Fire datasets only