Min.io Support - User-Provided S3 Clients

[kevinemoore]

Description

Allow users to pass their own S3 clients for accessing specific buckets to support Min.io and passing in S3 credentials outside of environment variables and config files.

TODO: how will this support bucket-to-bucket copy across different clients?

TODO

• Unit tests
• Automated tests (e.g. Preflight)
• Confirm that this change meets security best practices and does not violate the security model
• Documentation
  • Python: Run build.py for new docstrings
  • JavaScript: basic explanation and screenshot of new features
  • Markdown somewhere in docs/**/*.md that explains the feature to end users (said .md files should be linked from SUMMARY.md so they appear on https://docs.quiltdata.com)
  • Markdown docs for developers
• Changelog entry (skip if change is not significant to end users, e.g. docs only)

[codecov]

Codecov Report

Merging #3765 (80827f9) into master (6ba9401) will decrease coverage by 12.96%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #3765       +/-   ##
===========================================
- Coverage   34.82%   21.86%   -12.96%     
===========================================
  Files         709      675       -34     
  Lines       31104    25306     -5798     
  Branches     4637     4637               
===========================================
- Hits        10831     5534     -5297     
+ Misses      19124    18623      -501     
  Partials     1149     1149               

Flag	Coverage Δ
api-python	?
catalog	9.25% <ø> (ø)
lambda	86.26% <ø> (ø)

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see 34 files with indirect coverage changes

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