pkg/monitortests/clusterversionoperator: Add an exception for machine-config going Available=False on 'missing HTTP content-type'

It would be great if the machine-config operator addressed this
issue, but:

* We do not want to block pull requests from landing, or releases from
  being accepted, until they adjust their operator.  This behavior is
  likely longstanding, and we want to give folks time to gradually
  tighten operator logic without needing to rush.
* Even once the machine-config folks adjust their operator, this test
  suite will be used for test-cases that touch older releases
  (e.g. update and rollback jobs), and the test case doesn't yet allow
  for distinctions like "the machine-config operator at the time of the
  Available=False condition predates the bugfix landing, so that
  should still fall under the earlier exception".

Author: wking

pkg/monitortests/clusterversionoperator/legacycvomonitortests/operators.go

@@ -75,6 +75,9 @@ func testUpgradeOperatorStateTransitions(events monitorapi.Intervals) []*junitap
 			if condition.Type == configv1.OperatorAvailable && condition.Status == configv1.ConditionFalse && condition.Reason == "MachineConfigControllerFailed" && strings.Contains(condition.Message, "notAfter: Required value") {
 				return "https://issues.redhat.com/browse/OCPBUGS-22364", nil
 			}
+			if condition.Type == configv1.OperatorAvailable && condition.Status == configv1.ConditionFalse && strings.Contains(condition.Message, "missing HTTP content-type") {
+				return "https://issues.redhat.com/browse/OCPBUGS-24228", nil
+			}
 		case "monitoring":
 			if condition.Type == configv1.OperatorAvailable && (condition.Status == configv1.ConditionFalse && (condition.Reason == "PlatformTasksFailed" || condition.Reason == "UpdatingAlertmanagerFailed" || condition.Reason == "UpdatingConsolePluginComponentsFailed" || condition.Reason == "UpdatingPrometheusK8SFailed" || condition.Reason == "UpdatingPrometheusOperatorFailed")) || (condition.Status == configv1.ConditionUnknown && condition.Reason == "UpdatingPrometheusFailed") {
 				return "https://issues.redhat.com/browse/OCPBUGS-23745", nil