Upgrade fog-aws to v3.14.0

What does this MR do and why?

This upgrade adds an option to control IAM credential refresh intervals that is useful in situations described on issue #350118 (closed)

• Diff: https://github.com/fog/fog-aws/compare/v3.12.0..v3.14.0
• Gem diff: https://my.diffend.io/gems/fog-aws/3.12.0/3.14.0

How to set up and validate locally

Tests of new option aws_credentials_refresh_threshold_seconds in fog-aws are covered here: https://github.com/fog/fog-aws/blob/6ca4f0bb705b92e4d10d49eb4993e611cbaeff97/tests/credentials_tests.rb#L144-L198

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.