Upgrade go version to 1.18 (#5045)

* Upgrade go version to 1.18

* fix go 1.18 compatibility

* update gofmt

* ignore golangci-lint staticcheck

* update gofmt

hack/verify-shellcheck.sh

@@ -69,7 +69,7 @@ done < <(find . -name "*.sh" \
     -path ./_\*      -o \
     -path ./.git\*   -o \
     -path ./vendor\* -o \
-    -path ./hack/install_kubebuilder.sh -o \
+    -path ./LICENSES\* -o \
     \( -path ./third_party\* -a -not -path ./third_party/forked\* \) \
   \))
 
@@ -103,16 +103,18 @@ SHELLCHECK_OPTIONS=(
 )
 
 # tell the user which we've selected and lint all scripts
+# The shellcheck errors are printed to stdout by default, hence they need to be redirected
+# to stderr in order to be well parsed for Junit representation by juLog function
 res=0
 if ${HAVE_SHELLCHECK}; then
   echo "Using host shellcheck ${SHELLCHECK_VERSION} binary."
-  shellcheck "${SHELLCHECK_OPTIONS[@]}" "${all_shell_scripts[@]}" || res=$?
+  shellcheck "${SHELLCHECK_OPTIONS[@]}" "${all_shell_scripts[@]}" >&2 || res=$?
 else
   echo "Using shellcheck ${SHELLCHECK_VERSION} docker image."
   "${DOCKER}" run \
     --rm -v "${KUBE_ROOT}:${KUBE_ROOT}" -w "${KUBE_ROOT}" \
     "${SHELLCHECK_IMAGE}" \
-  shellcheck "${SHELLCHECK_OPTIONS[@]}" "${all_shell_scripts[@]}" || res=$?
+  shellcheck "${SHELLCHECK_OPTIONS[@]}" "${all_shell_scripts[@]}" >&2 || res=$?
 fi
 
 # print a message based on the result
@@ -133,4 +135,4 @@ else
 fi
 
 # preserve the result
-exit $res
+exit $res