ENH: GPU Support for Preview, Cache and Publish

[mmcky]

This PR adds GPU support for:

• cache
• preview
• publish

build workflows as they form the publishing pipeline.

To reduce costs we will continue to build:

• execution-linux, execution-win, execution-osx
• link checker

on GitHub actions with cpu only support.

[mmcky]

@HumphreyYang the hardware we have settled on is:

Name	Value
GPU	Tesla V100
# of vCPU	8
vCPU	Broadwell E5-2686 v4

with the following software for the GPU

Name	Value
Nvidia driver	470.141.03
CUDA version	11.4

[mmcky]

@HumphreyYang would you be able to take a final look at this preview and let me know if you spot any issues with rendering etc. It should all checkout but it would be nice as a double check just prior to changing our publishing workflows. I will also need to confirm that the gh-pages action works on a remote ec2 instance.

[mmcky]

@HumphreyYang I am going to merge this PR -- once I confirm the publish workflow has worked I will ask if you could have a quick review of the live site.

[HumphreyYang]

Hi @mmcky,

I did not spot any abnormality in the preview. I will have another look at the live site once deployed.

Thanks!