[release-22.0] Skip flaky TestRedial test (vitessio#19106) (vitessio#19107)

Co-authored-by: vitess-bot[bot] <108069721+vitess-bot[bot]@users.noreply.github.com>
Signed-off-by: Tanjin Xu <tanjin.xu@slack-corp.com>

Author: vitess-bot[bot]

go/vt/vtadmin/vtctldclient/proxy_test.go

@@ -123,6 +123,8 @@ func (d *testdisco) DiscoverVtctldAddrs(ctx context.Context, tags []string) ([]s
 // TestRedial tests that vtadmin-api is able to recover from a lost connection to
 // a vtctld by rediscovering and redialing a new one.
 func TestRedial(t *testing.T) {
+	t.Skip("flaky test, gRPC reconnection timing is unreliable")
+
 	// Initialize vtctld #1
 	listener1, server1, err := initVtctldServer()
 	require.NoError(t, err)