[Dynamo] skip some TorchScript tests (#128731)

We don't care about the Dynamo x TorchScript composition, so I'm
disabling these tests (so they don't get reported as flaky). Not
disabling all of the TorchScript tests yet because they have been useful
to catch random bugs.

Test Plan:
- CI
Pull Request resolved: https://github.com/pytorch/pytorch/pull/128731
Approved by: https://github.com/williamwen42

test/test_jit.py

@@ -4967,6 +4967,7 @@ a")
                     test(backward=True)
                     test(backward=True)
 
+    @skipIfTorchDynamo("Not a TorchDynamo suitable test")
     def test_index(self):
         def consec(size, start=0):
             numel = torch.tensor(size).prod().item()
@@ -6431,6 +6432,7 @@ a")
             cu = torch.jit.CompilationUnit(dedent(inspect.getsource(func_float_int)))
             cu.func_float_int(5.3, 0)
 
+    @skipIfTorchDynamo("Not a TorchDynamo suitable test")
     def test_math_ops(self):
         def checkMathWrap(func_name, num_args=1, is_float=True, **args):
             if is_float:
@@ -6959,6 +6961,7 @@ a")
         self.assertFalse(test_all_float_list([3.14, 0, 8.9]))
 
 
+    @skipIfTorchDynamo("Not a TorchDynamo suitable test")
     def test_number_math(self):
         ops_template = dedent('''
         def func():
@@ -7207,6 +7210,7 @@ a")
 
             test(op, tensor, const, swap_args)
 
+    @skipIfTorchDynamo("Not a TorchDynamo suitable test")
     def test_tensor_number_math(self):
         self._test_tensor_number_math()
 
@@ -7643,6 +7647,7 @@ dedent """
         with self.assertRaises(Exception):
             foo(2)
 
+    @skipIfTorchDynamo("Not a TorchDynamo suitable test")
     def test_isinstance(self):
         # test isinstance operator for static type checking
         template = dedent('''