Support --output for taps, with support for cloud filesystems

[aaronsteers]

Related to:

• Make batches replayable (intermediate data lake) #1245

This would add --output support for taps, allowing the STDOUT stream to be sent to a remote file source. We would leverage the cloud-compatible file operators so we could write to S3 or other backends, according to the supported file storage libraries.

We already have --input for targets, which allows them to read from a file source instead of from a STDIN.

As a follow-on or as part of this issue, we should also cloud filesystem support to the CLI args: --input for targets and --config to use cloud-hosted config files.

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