Support Instance Metadata and Crdentials Process for S3 Powerpack Credentials

[KyleLilly]

We ran into an issue when trying to move to the Nx S3 Powerpack from nx-aws. For our CI environment we use instance metadata for authenticating with AWS but it appears the powerpack does not support this. For local development we use credentials process. Can the code for the S3 powerpack be updated to use fromNodeProviderChain() instead of building a chain that only includes a subset of providers?

[Cammisuli]

Sorry about that! I'll update the package to include this. Thanks!