Remove Patched version of `buildx` from `ruby_docker` image
We've had to patch buildx
binary to support Bearer token locally since upstream was failing connects with CI buildx
kubernetes cluster via KAS:
we've also opened Add Bearer token support by droopy4096 · Pull Request #1891 · docker/buildx upstream.
As soon as upstream adopts PR #1891 we shall remove section that patches buildx
locally.