Use the build submodule

[bassam]

This project should use the build submodule to be consistent with other projects in the crossplane organization. Release flows have been automated in the build submodule, and it would make the release process a lot easier if this project was consistent/conformant.

We can explore making changes to the build system, but within the crossplane org I think there’s a big value in being consistent. If we change or replace the build sub module thats fine, but let’s do it across the org.