make op_split_with_sizes_copy support dynamic shape

[pytorchbot]

Summary: as title

Reviewed By: SS-JIA

Differential Revision: D56333587

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/3175

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:x: 1 New Failure

As of commit b569899ada8ddb5ab81e3e4707d84c808b30d559 with merge base d3326a2073dee7baf78044fb3afd0772edbc616a ():

NEW FAILURE - The following job has failed:

• pull / test-models-linux (cmake, llava_encoder, portable, linux.4xlarge, 90) / linux-job (gh) RuntimeError: Command docker exec -t e9fa09659c96295bcb094bace9b0eea56e24732ad871cd90e227b7293a92ede4 /exec failed with exit code 1

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