New module section hello-compute environments

[kenibrewer]

This is a work in progress section attempting to allow students to create a simulated compute environment using Tower Agent and something that can run on Gitpod.

I initially thought this might work as a "simulated" setup launching a Nextflow job designed to fail but after reading through the content, it just leaves a bad taste. I think we should stick with the more documentation-style training content until we can figure out a compute environment setup that works.

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[vdauwera]

Would be interesting to revisit this as a potential side quest, though it sounds like there's some work that's needed on the infrastructure side to make this possible.