Arm backend: Make run.sh handle portable ops using aten::<OP>.x_out

[zingo]

This is needed for squeeze e.g. --portable_kernels="aten::squeeze_copy.dims_out"

[pytorch-bot[bot]]

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As of commit 460f11c583c68682f08a290ab35b8272c70d1318 with merge base 43555d21c289669ecacca5cd46d9a9018c6d7f7c (): :green_heart: Looks good so far! There are no failures yet. :green_heart:

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[zingo]

@pytorchbot label "topic: not user facing"