fix(cli): do not print credentials refreshed by plugins

[mrgrain]

Issue #33394

Closes #33394

Reason for this change

In #32354 we started logging credentials provided by a plugin to stderr. In #32708 we changed the log statement in a way that the credentials would be logged to stdout in CI environments (but still to stderr in all other environments).

Description of changes

Do not log credentials.

Describe any new or updated permissions being added

n/a

Description of how you validated changes

n/a

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

(This review is outdated)

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[mrgrain]

Exempted test requirements.

Added pr-linter/cli-integ-tested despite it not being tested. The PR will have to go through the full pipeline anyway to be released and is low risk to break the pipeline before that.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.92%. Comparing base (9449f9c) to head (15d9a5b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #33398      +/-   ##
==========================================
- Coverage   80.92%   80.92%   -0.01%     
==========================================
  Files         236      236              
  Lines       14256    14255       -1     
  Branches     2491     2491              
==========================================
- Hits        11537    11536       -1     
  Misses       2434     2434              
  Partials      285      285              

Flag	Coverage Δ
suite.unit	80.92% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
packages/aws-cdk	79.74% <100.00%> (-0.01%)	⬇️
packages/aws-cdk-lib/core	82.20% <ø> (ø)

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 15d9a5b
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[github-actions]

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