Avoid persisting credentials in CI/CD GitHub workflow

[jakob-keller]

Description of Change

Avoid persisting credentials in CI/CD GitHub workflow

• https://woodruffw.github.io/zizmor/audits/#artipacked
• Remove persist-credentials or change the default to false actions/checkout#485

Assumptions

None

Checklist for All Submissions

• I have added change info to CHANGES.rst
• If this is resolving an issue (needed so future developers can determine if change is still necessary and under what conditions) (can be provided via link to issue with these details): closes Credential persistence through GitHub Actions artifacts #1337
  • Detailed description of issue
  • Alternative methods considered (if any)
  • How issue is being resolved
  • How issue can be reproduced
• If this is providing a new feature (can be provided via link to issue with these details):
  • Detailed description of new feature
  • Why needed
  • Alternatives methods considered (if any)

Checklist when updating botocore and/or aiohttp versions

• I have read and followed CONTRIBUTING.rst
• I have updated test_patches.py where/if appropriate (also check if no changes necessary)
• I have ensured that the awscli/boto3 versions match the updated botocore version
• I have added URL to diff: boto/botocore@[CURRENT_BOTO_VERSION_TAG]...[NEW_BOTO_VERSION_TAG]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.83%. Comparing base (750b860) to head (0dc9de3).
Report is 36 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1336   +/-   ##
=======================================
  Coverage   90.83%   90.83%           
=======================================
  Files          67       67           
  Lines        6559     6559           
=======================================
  Hits         5958     5958           
  Misses        601      601           

Flag	Coverage Δ
unittests	90.83% <ø> (ø)

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