Upgrade to Airflow 2.5.1, remove old warnings

[AetherUnbound]

Description

This PR upgrades Airflow to v2.5.1, which addresses an open security issue. I've also removed some warnings which we filter during testing since they are no longer raised!

Testing Instructions

1. just build
2. just test --extended
3. Launch the stack and make sure you can still run a DAG

Checklist

• My pull request has a descriptive title (not a vague title like
  Update index.md).
• My pull request targets the default branch of the repository (main) or
  a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible
  errors.
• I ran the DAG documentation generator (if applicable).

Developer Certificate of Origin

Developer Certificate of Origin

Developer Certificate of Origin
Version 1.1

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Developer's Certificate of Origin 1.1

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    have the right to submit it under the open source license
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    of my knowledge, is covered under an appropriate open source
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    in the file; or

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