[Inductor] Add DeviceAssert op to enable device-side assertion in torch.compile (#160677)

This PR introduces a device_assert op to trigger device-side assertions within torch.compile. This implementation is based on the suggestion in [this comment](https://github.com/pytorch/pytorch/issues/147282#issuecomment-2756056084).

Changes Included

- Implemented device_assert op and overrides has_side_effect to return True to avoid removal by dead code elimination.
- Commented out the assert_async_msg_decomp and functional_assert_async_msg_decomp decompositions to disable the default assert decomposition inside Inductor.
- Added lowering for torch.ops.aten._assert_async.msg to convert assert calls into the ops_handler.
- Implemented the codegen method for the device_assert op. This supports generating C++ and Triton code.
- Added test cases to verify both "should throw" and "should not throw" scenarios.

Fixes #147282

Pull Request resolved: https://github.com/pytorch/pytorch/pull/160677
Approved by: https://github.com/mlazos, https://github.com/atalman

torch/_inductor/scheduler.py

@@ -1279,6 +1279,13 @@ class SchedulerNode(BaseSchedulerNode):
                     )
         return buffers_store_as_atomic_add
 
+    @cache_on_self
+    def has_side_effects(self) -> bool:
+        # self._body is None sometimes that's why this check was added
+        if self._body is not None and self._body.has_op("device_assert_async"):
+            return True
+        return super().has_side_effects()
+
 
 def refresh_group_node_dependencies(
     group_snode: Union[FusedSchedulerNode, GroupedSchedulerNode],
@@ -1548,6 +1555,12 @@ class FusedSchedulerNode(BaseSchedulerNode):
 
         return buf.getrawvalue().rstrip()
 
+    @cache_on_self
+    def has_side_effects(self) -> bool:
+        if self.snodes is not None:
+            return any(node.has_side_effects() for node in self.snodes)
+        return super().has_side_effects()
+
 
 class ForeachKernelSchedulerNode(FusedSchedulerNode):
     """
@@ -3877,7 +3890,6 @@ class Scheduler:
         Determine if it is possible to combine node1 and node2 into a
         single fused node.
         """
-
         if node1 is node2:
             return False
 
@@ -3981,7 +3993,6 @@ class Scheduler:
         ):
             why("fusion for buffer explicit disabled")
             return False
-
         device = node1.get_device()
         device2 = node2.get_device()
         if device != device2: