automate creating release versions of manual more easily

[k-doering-NOAA]

I found updating the manual products a little awkward for 3.30.19. I think more automation could improve this and it would be great to get this working before 3.30.20. I love that just pushing a tag creates all the exes with the correct date and version for the stock synthesis release, and would love to mimic this with the documentation!

• create a workflow that deploys a new release version html manual when a tag is created of form v3.30.xx ands saves the pdf version of the manual (same workflow or two separate ones is fine)
• automate the manual version based on if it is associated with a tag or not (similar code available in the stock synthesis build scripts)
• set the date as being whatever the compile date is so there is no need to manually change the date
• create a workflow that creates a draft release when a tag is pushed and includes the pdf version of the manual as part of the release.