Arm backend: support standalone executor_runner #10329

Job	Run time
unittest-cuda / linux-job	25m 1s
test-executorch-cuda-build-12.8 / linux-job	20m 9s
test-executorch-cuda-build-12.6 / linux-job	19m 17s
test-executorch-cuda-build-13.0 / linux-job	18m 56s
test-executorch-cuda-build-12.9 / linux-job	22m 45s
test-models-cuda (mv3) / linux-job	28m 36s
test-models-cuda (conv1d) / linux-job	21m 55s
test-models-cuda (add) / linux-job	21m 36s
test-models-cuda (linear) / linux-job	21m 31s
test-models-cuda (sdpa) / linux-job	21m 28s
export-model-cuda-artifact	0s
test-models-cuda (mv2) / linux-job	28m 19s
test-models-cuda (add_mul) / linux-job	21m 25s
test-models-cuda (resnet18) / linux-job	22m 54s
test-model-cuda-e2e	0s
test-cuda-pybind	-1s
check-all-cuda-builds	4s
	4h 53m 55s

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