feat(object): add support for IAM Access Key syntax

[remyleone]

https://www.scaleway.com/en/docs/iam/api-cli/using-api-key-object-storage/#overriding-the-preferred-project-when-making-a-call

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Relates OR Closes #0000

Release note for CHANGELOG:

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 51.20%. Comparing base (da45726) to head (3c6480e).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4543      +/-   ##
==========================================
+ Coverage   51.19%   51.20%   +0.01%     
==========================================
  Files         324      324              
  Lines       75582    75600      +18     
==========================================
+ Hits        38692    38710      +18     
  Misses      35413    35413              
  Partials     1477     1477              

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