[Feature Request] Allow s3 link to config when submitting Atlas Checks to spark

[atiannicelli]

Is your feature request related to a problem? Please describe.
When issuing the Sharded Atlas Checks to spark there is a way to specify a URL to the atlas checks configuration file, but only a public URL is allowed. If an S3 link is provided then the spark jobs fail.

Describe the solution you'd like
This request is to allow to specify an AWS S3 link (s3://blah/configuration.json) in the "-configFiles" parameter so that private configuration files can be used when running the spark atlas checks jobs. The "-input" and "-output" parameter already allows for S3 links so I would think that this would be pretty easy.

Describe alternatives you've considered
The alternative is to post my config files somewhere that can be reached by public http URL. This is OK, but just could be better if it was an S3 link.