Move from MinIO to SeaweedFS for the synthetic S3 layer in tests

[valeriupredoi]

Description

Minio has moved from open source community to corporate, and it pulled all its containers from Docker and from Quai.IO. We are left scrambling for alternatives, one nice one, that works well and is maintained, and does what's written on the lid is SeaweedFS https://github.com/seaweedfs/seaweedfs - I configured it here, and it runs our thing well.

From Google: MinIO has effectively ended its open-source community project in favor of a strictly commercial, enterprise-focused model.Archived Repository: MinIO placed its open-source repository into maintenance mode and officially archived it as read-only, stopping all active upstream development, bug fixes, and security patches for the community edition.Removal of Free Binaries: Prior to archiving, the company stopped distributing pre-built binaries and Docker images for the community edition and stripped key management features from the free UI.Commercial Shift: The company now focuses entirely on its enterprise and government-tier product, MinIO AIStor, moving away from its roots as an open-source tool.License Status: While the older frozen source code technically remains under the AGPLv3 license, there is no active maintenance or official support from the creators.

Before you get started

• ☝ Create an issue to discuss what you are going to do

Checklist

• This pull request has a descriptive title and labels
• This pull request has a minimal description (most was discussed in the issue, but a two-liner description is still desirable)
• Unit tests have been added (if codecov test fails)
• Any changed dependencies have been added or removed correctly (if need be)
• If you are working on the documentation, please ensure the current build passes
• All tests pass

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.19%. Comparing base (2a351a1) to head (0daa7da).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #361   +/-   ##
=======================================
  Coverage   93.19%   93.19%           
=======================================
  Files           7        7           
  Lines         691      691           
=======================================
  Hits          644      644           
  Misses         47       47           

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