S3 Storage: Support AWS Signature Version 4 query parameters

[darthhexx]

Is your feature request related to a problem? Please describe.

When setting STORAGE_TYPE=s3 the requests to /storage-data/uploaded/?filepath=upload/1/somefile result in generated URLs for AWS presigned with the old format: URL?AWSAccessKeyId=AKIA...redacted...&Signature=F1H25pgUkZwDhV0S2b%2F48rPibWk%3D&Expires=1696592186.

This is due to this call to the Django S3Boto3Storage class and, because the setting for the signature version in the Django setting AWS_S3_SIGNATURE_VERSION is None, the old signature version is being used.

Describe the solution you'd like

We should introduce an environment variable that enable us to override the setting to s3v4, the only supported version in AWS S3, but keeps the existing behaviour by default so as not to break existing setups.

Describe alternatives you've considered

I think this is the best option, as it keeps the existing behaviour but allows it to be overridden to the latest version.

[hogepodge]

Thanks for catching this. I'll bring it to the engineering team to get the work scoped out.

[darthhexx]

Thanks @hogepodge. I have a proposed fix in #4869 that I am using in my deployment, which works as expected.

[bmartel]

Thanks a bunch @darthhexx. This has been merged back in, closing this issue!