wip: the start of a specialized LSF+Apptainer backend

[acfoltzer]

WIP early draft for sharing and collaboration

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[adthrasher]

I haven't reviewed in detail, but do you plan to make these composable? That is, separating the containerization logic from the batch system logic. Something like having apptainer, podman, etc. and then separately lsf, slurm, etc. Then a user could choose their containerization method and their batch system.

[acfoltzer]

Yes, we're starting with the system that's specialized to the environment we have close at hand, but once we land that and get access to another system for testing, it seems likely that we'll be able to make them composable.

[acfoltzer]

Closing in favor of stjude-rust-labs/sprocket#182