Replace the KCI standard makefile build system with Yocto and Baserock

Issue Background

Kernel CI (out of the box) uses a python build script that essentially just calls the make utility to build the kernel. Many Embedded Systems developers use tools like Baserock and Yocto to add just the parts they need and build a kernel from that.

Issue description

KernelCI should include these common tools to help increase adoption and better serve the Embedded Linux community

Acceptance criteria

This issue will be closed when both Baserock and Yocto are supported in KernelCI or if the team decides to abandon this issue.