topics: add and use operobsgen

report if the NUMAResourcesOperator object exposes
the ObservedGeneration in status, so we can consume
the value in the e2e tests and have more robust runs.

Signed-off-by: Francesco Romani <fromani@redhat.com>

Author: ffromani

internal/api/features/_topics.json

@@ -23,6 +23,7 @@
     "nrtcrdanns",
     "netpols",
     "mgselinuxcollect",
-    "tlscompliance"
+    "tlscompliance",
+    "operobsgen"
   ]
 }

test/e2e/serial/tests/configuration.go

@@ -22,6 +22,7 @@ import (
 	"errors"
 	"fmt"
 	"reflect"
+	"slices"
 	"sort"
 	"strconv"
 	"strings"
@@ -1844,6 +1845,10 @@ func isNROOperSyncedAt(nropStatus *nropv1.NUMAResourcesOperatorStatus, condition
 	if cond.Status != metav1.ConditionTrue {
 		return errors.New("condition not true")
 	}
+	// TODO: until all the version reports ObservedGeneration
+	if serialconfig.Config != nil && !slices.Contains(serialconfig.Config.ClusterTopics.Active, "operobsgen") {
+		return nil
+	}
 	if cond.ObservedGeneration != gen {
 		return fmt.Errorf("condition at %d expected %d", cond.ObservedGeneration, gen)
 	}