Amazon S3 auth changes

[HansHappyHorizon]

Describe your changes

It's now also possible to create an AmazonS3Client with only a region, or without any parameters at all. This is useful for websites hosted on AWS that authenticate themselves through AWS services internally.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How was this tested?

Checked if leaving out the access and secret keys would still create a client with only a region, and if leaving out the AWS settings completely that it would still create a client without credentials AND region.

Checklist before requesting a review

• I have reviewed and tested my changes
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I selected develop as the base branch and not main, or the pull request is a hotfix that needs to be done directly on main
• I double checked all my changes and they contain no temporary test code, no code that is commented out and no changes that are not part of this branch
• I added new unit tests for my changes if applicable

Related pull requests

N/A

Jira issue key

CON-672