Actions for docker builds and testing. Providing ready-made containers for testing alicevision against different cuda versions available and releasing docker images for rapid development

[sanchayanghosh]

Currently, the ci yaml has a dockerfile that is manually built and use for further building AliceVision. We could have an actions file that leverages the docker plugins in github actions to build the docker images according to the docker scripts we now have present, and push the docker images either to DockerHub or Github Packages registry for use in development/containerized deployment.

By having this ci cycle (a docker ci cycle) continuously run, we can also figure out issues in the docker containerization and rectify any issues that may occur.