[dynamo] Graph break on set_num_threads (pytorch#126623)

Fixes pytorch#125364

Pull Request resolved: pytorch#126623
Approved by: https://github.com/yanboliang

Author: jansel

test/dynamo_expected_failures/TestSortAndSelectCPU.test_sort_overflow_cpu_int16 test/dynamo_skips/TestNNDeviceTypeCPU.test_conv_empty_input_cpu_complex128

@@ -1302,9 +1302,6 @@
         "torch._C.parse_schema",
         "torch._C.parse_type_comment",
         "torch._C.read_vitals",
-        "torch._C.set_flush_denormal",
-        "torch._C.set_num_interop_threads",
-        "torch._C.set_num_threads",
         "torch._C.set_vital",
         "torch._C.unify_type_list",
         "torch._C.vitals_enabled",