Rename KUBE_OUTPUT_BINPATH -> KUBE_OUTPUT_BIN

"...PATH" doesn't add anything and confuses it with KUBE_OUTPUT_SUBPATH.

hack/update-netparse-cve.sh

@@ -31,7 +31,7 @@ source "${KUBE_ROOT}/hack/lib/util.sh"
 kube::golang::verify_go_version
 
 # Ensure that we find the binaries we build before anything else.
-export GOBIN="${KUBE_OUTPUT_BINPATH}"
+export GOBIN="${KUBE_OUTPUT_BIN}"
 PATH="${GOBIN}:${PATH}"
 
 # Explicitly opt into go modules, even though we're inside a GOPATH directory