verify scripts: preserve exit code

these scripts used the result variable pattern but then explicitly exited early with a hardcoded value ....

hack/verify-e2e-images.sh

@@ -49,5 +49,5 @@ else
   >&2 echo "See: test/images/agnhost/README.md"
   >&2 echo ""
   >&2 echo "You can reach out to https://git.k8s.io/community/sig-testing for help."
-  exit 1
 fi
+exit $ret

hack/verify-golangci-lint.sh

@@ -238,7 +238,6 @@ else
     fi
     echo
   } >&2
-  exit 1
 fi
 
 # preserve the result

hack/verify-shellcheck.sh

@@ -133,7 +133,6 @@ else
     echo 'See: https://github.com/koalaman/shellcheck/wiki/Ignore#ignoring-one-specific-instance-in-a-file'
     echo
   } >&2
-  exit 1
 fi
 
 # preserve the result

staging/src/k8s.io/apiextensions-apiserver/examples/client-go/hack/verify-codegen.sh

@@ -40,5 +40,5 @@ if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
-  exit 1
 fi
+exit $ret

staging/src/k8s.io/apiextensions-apiserver/hack/verify-codegen.sh

@@ -40,5 +40,5 @@ if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
-  exit 1
 fi
+exit $ret

staging/src/k8s.io/code-generator/examples/hack/verify-codegen.sh

@@ -40,7 +40,7 @@ if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
-  exit 1
+  exit $ret
 fi
 
 # smoke test

staging/src/k8s.io/kube-aggregator/hack/verify-codegen.sh

@@ -40,5 +40,5 @@ if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
-  exit 1
 fi
+exit $ret

staging/src/k8s.io/metrics/hack/verify-codegen.sh

@@ -40,5 +40,5 @@ if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
-  exit 1
 fi
+exit $ret

staging/src/k8s.io/sample-apiserver/hack/verify-codegen.sh

@@ -40,5 +40,5 @@ if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
-  exit 1
 fi
+exit $ret

staging/src/k8s.io/sample-controller/hack/verify-codegen.sh

@@ -40,5 +40,5 @@ if [[ $ret -eq 0 ]]; then
   echo "${DIFFROOT} up to date."
 else
   echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
-  exit 1
 fi
+exit $ret