Add NodeFeatureGroup CRD

The NodeFeatureGroup is an NFD-specific custom resource that is designed for
grouping nodes based on their features. NFD-Master watches for NodeFeatureGroup
objects in the cluster and updates the status of the NodeFeatureGroup object
with the list of nodes that match the feature group rules. The NodeFeatureGroup
rules follow the same syntax as the NodeFeatureRule rules.

Signed-off-by: Carlos Eduardo Arango Gutierrez <eduardoa@nvidia.com>

Dockerfile_generator

@@ -4,8 +4,6 @@ FROM ${BUILDER_IMAGE} as builder
 # Install tools
 RUN go install github.com/vektra/mockery/v2@v2.42.0 && \
     go install sigs.k8s.io/controller-tools/cmd/controller-gen@v0.14.0 && \
-    git clone https://github.com/kubernetes/code-generator -b v0.29.0 --depth 1 && \
-    go install k8s.io/code-generator/cmd/go-to-protobuf/...@v0.29.0 && \
     go install golang.org/x/tools/cmd/goimports@v0.11.0 && \
     go install github.com/golang/protobuf/protoc-gen-go@v1.4.3