cmd: Move CVO CLI to a separate folder

So that we can have multiple CLI applications in the `cmd` folder.

Author: DavidHurta

cmd/image.go renamed to cmd/cluster-version-operator/image.go

@@ -31,4 +31,4 @@ fi
 mkdir -p ${BIN_PATH}
 
 echo "Building ${REPO} (${VERSION_OVERRIDE})"
-GOOS=${GOOS} GOARCH=${GOARCH} go build ${GOFLAGS} -ldflags "${GLDFLAGS}" -o ${BIN_PATH}/cluster-version-operator ${REPO}/cmd/...
+GOOS=${GOOS} GOARCH=${GOARCH} go build ${GOFLAGS} -ldflags "${GLDFLAGS}" -o ${BIN_PATH}/cluster-version-operator ${REPO}/cmd/cluster-version-operator/...