(experiment) consider removing Makefiles

[jaxxstorm]

One of the more frustrating elements of the build process is dealing with the Makefile syntax we're currently using:

• It's difficult to generate Makefiles programmatically
• The syntax doesn't lend itself well to multi stage builds
• It's quickly becoming complex

Ideally, we could try and replace this with a task runner which will allow us to generate these files programmatically with jk.

I've had some success before with https://github.com/go-task/task which uses a YAML config file, so we should try it out

[jkodroff]

Also:

• We don't use proper file targets in Make, which results in unnecessary work being done.
• Updating 60+ providers manually is a lot of toil.
• Make does not work in PowerShell, requiring the use WSL on Windows.

[danielrbradley]

Fixed in #195 based on exploration work in pulumi/pulumi-awsx#859