github/workflows: switch to configure-aws-credentials

[d4l3k]

Our integration tests are hitting an error when acquiring AWS credentials.

botocore.errorfactory.InvalidIdentityTokenException: An error occurred (InvalidIdentityToken) when calling the AssumeRoleWithWebIdentity operation: Couldn't retrieve verification key from your identity provider,  please reference AssumeRoleWithWebIdentity documentation for requirements

https://github.com/pytorch/torchx/runs/5147711223?check_suite_focus=true

This switches to the aws-actions/configure-aws-credentials GitHub action since it includes retries as of aws-actions/configure-aws-credentials#350

Test plan:

CI

[codecov]

Codecov Report

Merging #386 (10c76db) into main (2d02dff) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #386   +/-   ##
=======================================
  Coverage   93.96%   93.96%           
=======================================
  Files          64       64           
  Lines        3565     3565           
=======================================
  Hits         3350     3350           
  Misses        215      215           

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@d4l3k has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.