[Falcon][NMS][non-functional] Migrate BoxWithNMSLimit to Cadence namespace as a custom op from Caffe2

[zonglinpeng]

Stack from ghstack (oldest at bottom):

• -> [Falcon][NMS][non-functional] Migrate BoxWithNMSLimit to Cadence namespace as a custom op from Caffe2 #15502

To add the op when to_edge or to_executorch, import executorch.backends.cadence.aot.ops_registrations # noqa

Differential Revision: D78835800

[pytorch-bot]

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❌ 2 New Failures, 1 Unrelated Failure

As of commit 5d386c2 with merge base 11f752c ():

NEW FAILURES - The following jobs have failed:

• Lint / lintrunner / linux-job (gh)
  >>> Lint for backends/cadence/aot/replace_ops.py:
• pull / unittest-editable / windows / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• Test CUDA Builds / export-voxtral-cuda-non-quantized / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

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