Missing WebIdentityTokenFileCredentialsProvider Authentication makes using IRSA on EKS for S3 authentication difficult

[scottaubrey]

We're using cantaloupe on EKS within AWS environment as a frontend to an S3 Bucket.

For best practice and security, we'd like to use the authentication mechanism built into EKS to allow IAM permissions to be granted to workloads rather than the cluster, or having to embed credentials in a secret. That mechanism is supported by the AWS SDK by default, but is not included in the overridden authentication provider chain in cantaloupe.

We have been running with a patched version of cantaloupe in production for over a year and it works well, but I'm no Java developer and I couldn't get it to build as a multiplatform image using the build scripts linked in that repo, useful as a number of our team use Apple Silicon macs.

I will create a pull request with this patch, in the hopes that it does actually satisfy and work for the build process to create a multi-platform image and we can drop our patched build.