Qualcomm AI Engine Direct - fix optrace demo script and remove redundant flags from QNN tool #5444

Job	Run time
unittest-cuda / linux-job	24m 56s
test-models-cuda (resnet18) / linux-job	22m 40s
test-models-cuda (add) / linux-job	21m 50s
test-executorch-cuda-build-12.9 / linux-job	22m 21s
test-executorch-cuda-build-13.0 / linux-job	18m 42s
test-models-cuda (conv1d) / linux-job	22m 1s
test-models-cuda (linear) / linux-job	21m 55s
test-models-cuda (sdpa) / linux-job	21m 59s
test-models-cuda (add_mul) / linux-job	22m 1s
test-executorch-cuda-build-12.6 / linux-job	19m 42s
test-executorch-cuda-build-12.8 / linux-job	20m 24s
export-model-cuda-artifact	0s
test-model-cuda-e2e	0s
check-all-cuda-builds	2s
	3h 58m 33s

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