golang: Update to 1.18 from 1.18rc1

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

hack/lib/golang.sh

@@ -480,6 +480,7 @@ EOF
   local go_version
   IFS=" " read -ra go_version <<< "$(GOFLAGS='' go version)"
   local minimum_go_version
+  # TODO(dims): Need to switch this to 1.18 once we update images to newer go version
   minimum_go_version=go1.17.0
   if [[ "${minimum_go_version}" != $(echo -e "${minimum_go_version}\n${go_version[2]}" | sort -s -t. -k 1,1 -k 2,2n -k 3,3n | head -n1) && "${go_version[2]}" != "devel" ]]; then
     kube::log::usage_from_stdin <<EOF