Upgrade to Pydantic v2

[smohiudd]

Description

The STAC and Ingest APIs are both using packages that have Pydantic V1 as a dependency:

Ingest API:

The Ingest API is using a forked/pinned version of stac-pydantic which is still using pydantic v1. The changes from that fork should now be available in a new version of stac-pydantic so we should now upgrade to stac-pydantic >=v3.0.x. (which uses pydantic v2).

STAC API

The STAC Api is using stac-fastapi v2.4 which uses Pydantic v1. stac-fastapi >=3.0 uses Pydantic v2

Acceptance Criteria

• [ ] Ingest API (stac-pydantic) is using stac-pydantic version that uses pydantic v2 and tested using endpoints and Airflow
• [ ] STAC API (stac-fastapi) is using >=3.0

[smohiudd]

Migration guide: https://docs.pydantic.dev/latest/migration/