feature: migrate to https://github.com/crossplane/build

[Breee]

https://github.com/upbound/build is deprecated

Upbound people recommend to switch:

git submodule set-url -- build https://github.com/crossplane/build
git submodule sync
cd build
git checkout main
git pull

-> Everything starts to burn if we do that -> Investigation is needed how the Makefile has to be changed.