Migrate build from `kbuild` to `kdist`

[tothtamas28]

Source and documentation: https://github.com/runtimeverification/pyk/tree/master/src/pyk/kdist

As a kdist target executes arbitrary Python code, it also allows for generation of artifacts other than kompiled definitions, e.g. the GLR parser.

[yanliu18]

The current kbuild implementation works fine for us. Since we have other high priority tasks, we should delay addressing this issue to a future time when necessary.