roachtest: metamorphically pcr bump reader tenant system table ids

Epic: none

Release note: none

Author: msbutler

pkg/cmd/roachtest/tests/cluster_to_cluster.go

@@ -575,7 +575,7 @@ func (rd *replicationDriver) setupC2C(
 	destSQL := sqlutils.MakeSQLRunner(destDB)
 
 	srcClusterSettings(t, srcSQL)
-	destClusterSettings(t, destSQL, rd.rs.additionalDuration)
+	destClusterSettings(t, destSQL, rd.rng, rd.rs.additionalDuration)
 
 	overrideSrcAndDestTenantTTL(t, srcSQL, destSQL, rd.rs.overrideTenantTTL)
 
@@ -1869,7 +1869,9 @@ func srcClusterSettings(t test.Test, db *sqlutils.SQLRunner) {
 	)
 }
 
-func destClusterSettings(t test.Test, db *sqlutils.SQLRunner, additionalDuration time.Duration) {
+func destClusterSettings(
+	t test.Test, db *sqlutils.SQLRunner, rng *rand.Rand, additionalDuration time.Duration,
+) {
 	db.ExecMultiple(t,
 		`SET CLUSTER SETTING kv.rangefeed.enabled = true;`,
 		`SET CLUSTER SETTING kv.lease.reject_on_leader_unknown.enabled = true;`,
@@ -1881,6 +1883,10 @@ func destClusterSettings(t test.Test, db *sqlutils.SQLRunner, additionalDuration
 		db.Exec(t, fmt.Sprintf(`SET CLUSTER SETTING stream_replication.replan_flow_frequency = '%s'`,
 			replanFrequency))
 	}
+
+	if rng.Intn(2) == 0 {
+		db.Exec(t, `SET CLUSTER SETTING physical_cluster_replication.reader_system_table_id_offset = 100000`)
+	}
 }
 
 func overrideSrcAndDestTenantTTL(