Remove non-prod Fhir servers from DB startup

[bamader]

Description:

For any FHIR servers determined to not be prod-available in the QC by default, remove these servers from the flyway migrations and instead place them into a DIBBs custom asset JSON file, just as we did with our queries, valuesets, and the like. There should just be a simple structure you should need to define and then parse during app startup to populate the fhir-servers const array with the information we load from this file. Note that this will need to happen automatically on `docker compose up` so that connections are in place for any seeding operations.

Acceptance Criteria:

Non-prod fhir servers are removed from DB startup

[linear]

QUE-105 Remove non-prod Fhir servers from DB startup