chore: better database migrations - managed by supabase

[YrrepNoj]

This PR introduces a new approach to how we perform data migrations for our LFAI applications.

1. Instead of running the migration scripts as part of the entrypoint scripts of the POSTGRES containers we are running the migrations as a k8s job for each deployment that needs the migration (in this case the API and UI deployments).
2. Instead of running the migration scripts with raw PSQL we are utilizing the supabase cli to perform and manage our migrations.

• The supabase CLI helps manage our migrations by tracking the history of past migration scripts that got run. With the CLI rerunning the same migration will not break as it will know the migration script already ran and won't attempt to re-run it.

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