chore(aws): Remove token from log line

[jfagoagas]

Description

We need to remove a log line in the AWS Provider that shows boto3 credentials, is not something critical because they are dynamic and short-lived, it lasts just one hour.

Checklist

• Are there new checks included in this PR? No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• Review if the code is being covered by tests.
• Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings
• Review if backport is needed.

License

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

[pedrooot]

LGTM!

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 86.94%. Comparing base (15b8801) to head (6f84387).
Report is 1 commits behind head on v3.

Files with missing lines	Patch %	Lines
prowler/providers/aws/aws_provider.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #4904      +/-   ##
==========================================
+ Coverage   86.93%   86.94%   +0.01%     
==========================================
  Files         714      714              
  Lines       22504    22503       -1     
==========================================
+ Hits        19564    19566       +2     
+ Misses       2940     2937       -3     

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