Hardcode dnsmasq ignition config version to 3.2

This is the "default" version supported by the Machine Config Operator v4.7,
and has been explicitly set here to avoid vender dependency updates bumping
this version up.

pkg/operator/controllers/dnsmasq/dnsmasq.go

@@ -11,6 +11,7 @@ import (
 	"text/template"
 
 	"github.com/Azure/go-autorest/autorest/to"
+	"github.com/blang/semver"
 	ign3types "github.com/coreos/ignition/v2/config/v3_2/types"
 	mcv1 "github.com/openshift/machine-config-operator/pkg/apis/machineconfiguration.openshift.io/v1"
 	"github.com/vincent-petithory/dataurl"
@@ -90,7 +91,13 @@ func ignition3Config(clusterDomain, apiIntIP, ingressIP string, gatewayDomains [
 
 	ign := &ign3types.Config{
 		Ignition: ign3types.Ignition{
-			Version: ign3types.MaxVersion.String(),
+			// This Ignition Config version should be kept up to date with the default
+			// rendered Ignition Config version from the Machine Config Operator version
+			// on the lowest OCP version we support (4.7).
+			Version: semver.Version{
+				Major: 3,
+				Minor: 2,
+			}.String(),
 		},
 		Storage: ign3types.Storage{
 			Files: []ign3types.File{