GPU compute and install section edits

[crahrig]

Simplified the GPU compute section to emphasize the parallelization of math as the big win with a GPU. Removed some of the content in the install section as the high level workflows makes the most sense to call out IMO.

[opbld30]

Docs Build status updates of commit 045af61:

✅ Validation status: passed

File	Status	Preview URL	Details
WSL/tutorials/gpu-compute.md	✅Succeeded

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