acctz: use helpers.GetRouterTime for RecordSubscribe timestamps

The record_payload_truncation and record_subscribe_full tests use
time.Now() from the test host as the RecordSubscribe request timestamp.
Clock skew between the test host and DUT (~300-825ms observed) causes
the acctz service to reject the timestamp as "in the future", resulting
in deterministic test failures.

Replace time.Now() with helpers.GetRouterTime() to source the timestamp
from the DUT's own clock, matching the pattern already used in
record_subscribe_non_grpc and record_subscribe_partial.

Author: pjacakArista

feature/gnsi/acctz/tests/record_payload_truncation/record_payload_truncation_test.go

@@ -78,11 +78,14 @@ func TestAccountzRecordPayloadTruncation(t *testing.T) {
 		helpers.GnmiCLIConfig(t, dut, communitySetCLIConfig)
 	}
 
-	startTime := time.Now()
-
+	// Get the current time from the router via gNMI to avoid clock skew issues.
+	startTime := helpers.GetRouterTime(t, dut)
 	acctzClient := dut.RawAPIs().GNSI(t).AcctzStream()
 	acctzSubClient, err := acctzClient.RecordSubscribe(context.Background(), &acctzpb.RecordRequest{
-		Timestamp: timestamppb.New(startTime),
+		Timestamp: &timestamppb.Timestamp{
+			Seconds: startTime.Unix(),
+			Nanos:   0,
+		},
 	})
 	if err != nil {
 		t.Fatalf("Failed to subscribe to acctz records: %v", err)

feature/gnsi/acctz/tests/record_subscribe_full/record_subscribe_full_test.go

@@ -26,6 +26,7 @@ import (
 
 	"github.com/openconfig/featureprofiles/internal/deviations"
 	"github.com/openconfig/featureprofiles/internal/fptest"
+	"github.com/openconfig/featureprofiles/internal/helpers"
 	"github.com/openconfig/featureprofiles/internal/security/acctz"
 	acctzpb "github.com/openconfig/gnsi/acctz"
 	"github.com/openconfig/ondatra"
@@ -53,8 +54,8 @@ func TestAccountzRecordSubscribeFull(t *testing.T) {
 	} else {
 		acctz.SetupUsers(t, dut, false)
 	}
-	startTime := time.Now()
-
+	// Get the current time from the router via gNMI to avoid clock skew issues.
+	startTime := helpers.GetRouterTime(t, dut)
 	// Get gNSI record subscribe client.
 	requestTimestamp := &timestamppb.Timestamp{
 		Seconds: startTime.Unix(),