rf(script): Load config from file/env

[effigies]

Updates to scripts/s3-delete-all-versions.py

• Adds config loading from file/env. The old flags still work, but now you can explicitly opt in to reading them from the environment with --env or from a secrets file with --config.
• Adds a dry-run flag
• Uses Typer for the CLI since that's what I've been using lately and requires less looking up than sticking with argparse

Surprisingly large diff for what I was trying to do, mostly stuff copied from #3773, but running ruff increased the size.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.87%. Comparing base (942aa63) to head (4bab540).
⚠️ Report is 10 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3782      +/-   ##
==========================================
+ Coverage   42.60%   44.87%   +2.26%     
==========================================
  Files         642      642              
  Lines       34488    34497       +9     
  Branches     1557     1653      +96     
==========================================
+ Hits        14695    15480     +785     
+ Misses      19646    18880     -766     
+ Partials      147      137      -10     

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