[TF:TRT] Disable quantization_mnist_test for CUDA 11.

This is to workaround b/166308253.

PiperOrigin-RevId: 328740058
Change-Id: I5dcc4ee390e7f5971cb5861067b8785ade5dc40d

Author: bixia1

tensorflow/python/compiler/tensorrt/BUILD

@@ -169,6 +169,7 @@ cuda_py_test(
     ],
     python_version = "PY3",
     tags = [
+        "no_cuda11",  # TODO(b/166308253): enable the test for CUDA 11.
         "no_cuda_on_cpu_tap",
         "no_oss",  # TODO(b/125290478): allow running in at least some OSS configurations.
         "no_pip",