Register split_copy in CoreML (#12836)

As titled.

Author: metascroy

backends/apple/coreml/compiler/torch_ops.py

@@ -15,6 +15,7 @@
     _get_inputs,
     NUM_TO_NUMPY_DTYPE,
     NUM_TO_TORCH_DTYPE,
+    split,
     transpose,
     unbind,
 )
@@ -37,6 +38,12 @@ def unbind_copy(context, node):
     unbind(context, node)
 
 
+# https://github.com/apple/coremltools/pull/2563
+@register_torch_op(override=False)
+def split_copy(context, node):
+    split(context, node)
+
+
 # https://github.com/apple/coremltools/pull/2558
 @register_torch_op(
     torch_alias=["torchao::dequantize_affine", "torchao.dequantize_affine"],