Added kubebuilder installation for non-linux-amd64 developers

Signed-off-by: Gustavo Carvalho <gustavo.carvalho@container-solutions.com>

docs/contributing-devguide.md

@@ -13,8 +13,16 @@ If you want to run controller tests you also need to install kubebuilder's `envt
 ```
 export KUBEBUILDER_TOOLS_VERSION='1.20.2' # check for latest version or a version that has support to what you are testing
 
+# Using Linux
 curl -sSLo envtest-bins.tar.gz "https://storage.googleapis.com/kubebuilder-tools/kubebuilder-tools-$KUBEBUILDER_TOOLS_VERSION-linux-amd64.tar.gz"
 
+# Using MacOS (OSX)
+#curl -sSLo envtest-bins.tar.gz "https://storage.googleapis.com/kubebuilder-tools/kubebuilder-tools-$KUBEBUILDER_TOOLS_VERSION-darwin-amd64.tar.gz"
+
+# Using ARM based processors
+#curl -sSLo envtest-bins.tar.gz "https://storage.googleapis.com/kubebuilder-tools/kubebuilder-tools-$KUBEBUILDER_TOOLS_VERSION-linux-arm64.tar.gz"
+
+
 sudo mkdir -p /usr/local/kubebuilder
 sudo tar -C /usr/local/kubebuilder --strip-components=1 -zvxf envtest-bins.tar.gz
 ```