Fix the 'reason' text in metallb Reconcile

Change errorMsg value to "internal error" because previously,
assigning it the error message string resulted in failure to update the condition
having the following error:

status.conditions[3].reason in body should match '^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$'",
"errorVerbose": "MetalLB.metallb.io \"metallb\" is invalid: status.conditions[3].reason: Invalid value:

i.e. the error message includes invalid characters.
we do print the error message under the status.conditions.message.

Example of the error message that includes invalid characters:

"FailedToSyncMetalLBResources: could not apply (apps/v1, Kind=Deployment) openshift-metallb-system/controller:
could not update object (apps/v1, Kind=Deployment) openshift-metallb-system/controller: Operation cannot be
fulfilled on deployments.apps \\\"controller\\\": the object has been modified; please apply your changes to the
latest version and try again\"

Signed-off-by: liornoy <[email protected]>

controllers/metallb_controller.go

@@ -106,7 +106,7 @@ func (r *MetalLBReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ct
 	if condition != "" {
 		errorMsg, wrappedErrMsg := condition, ""
 		if err != nil {
-			errorMsg = err.Error()
+			errorMsg = "internal error"
 			if errors.Unwrap(err) != nil {
 				wrappedErrMsg = errors.Unwrap(err).Error()
 			}