Build with GitHub CI

[ebaron]

Using a GitHub workflow instead of the Quay build automation would give us some more flexibility over how the images are tagged. Ideally our development versions could be tagged 'X.Y.Z-dev/snapshot', to bring them in line with other Cryostat images. After reading this issue actions/runner-images#1445, I'm unsure whether this would help or hurt the issue of DockerHub rate limiting.

[andrewazores]

I'm taking this on now for the purpose of https://github.com/cryostatio/cryostat/issues/1329 , but it should also be easier to bring this in-line with the other repos for branch/tag workflows after this work is done.