Move remove passes to iterative section (#16049)

Summary:

This change reorganizes the pass execution order by moving the remove passes (clone removal, permute removal, etc.) into the iterative section of the pass manager.

Previously, these passes were executed in a single-shot manner. By moving them to the iterative section, the pass manager can now run these optimization passes repeatedly until a fixed point is reached, where no further optimizations can be applied. This is important because removing one operation may enable additional removal opportunities that weren't visible before.

Reviewed By: hsharma35

Differential Revision: D88109852

Author: eigen-k

backends/cadence/aot/remove_ops.py

@@ -909,7 +909,7 @@ def maybe_remove_or_replace(self, node: Node) -> bool:
         return False
 
 
-class CommonRemovePasses:
+class CadenceRemoveNops:
     passes: List[Type[ExportPass]] = [
         RemoveAliasCopyOpPass,
         RemoveNopExpandOpPass,
@@ -920,12 +920,6 @@ class CommonRemovePasses:
         RemoveSqueezeViewBeforeElementwiseOps,
         RemoveCatFromSliceCopyPass,
         RemoveCloneOpsTransformImported,
-    ]
-
-
-class CadenceRemoveNops:
-    passes: List[Type[ExportPass]] = CommonRemovePasses.passes + [
-        SimplifySliceOpPass,
         RemoveNopRequantizeOpPass,
         RemoveZeroSizedConstantPadNd,
         RemoveContiguousOpPass,