crosscluster/physical: skip TestAlterTenantAddReader under deadlock

Informs #146788

Epic: none

Author: msbutler

pkg/crosscluster/physical/alter_replication_job_test.go

@@ -22,6 +22,7 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/testutils"
 	"github.com/cockroachdb/cockroach/pkg/testutils/jobutils"
 	"github.com/cockroachdb/cockroach/pkg/testutils/serverutils"
+	"github.com/cockroachdb/cockroach/pkg/testutils/skip"
 	"github.com/cockroachdb/cockroach/pkg/testutils/sqlutils"
 	"github.com/cockroachdb/cockroach/pkg/util/hlc"
 	"github.com/cockroachdb/cockroach/pkg/util/leaktest"
@@ -118,6 +119,8 @@ func TestAlterTenantAddReader(t *testing.T) {
 	defer leaktest.AfterTest(t)()
 	defer log.Scope(t).Close(t)
 
+	skip.UnderDeadlock(t, "flakes with deadlock detector")
+
 	ctx := context.Background()
 	args := replicationtestutils.DefaultTenantStreamingClustersArgs