Arm: Create script for model testing and split run.sh example script

[zingo]

Create model test script and break up run.sh into smaller scripts that can be used from both places.

New model test script can be used like this:

$ python3 backends/arm/test/test_model.py --build_libs
$ python3 backends/arm/test/test_model.py --target=ethos-u55-64 --model=lstm
$ python3 backends/arm/test/test_model.py --target=ethos-u85-256 --model=mul

This change also makes it possible to run the things in run.sh in separate steps like this:

1. Build needed libs

$ backends/arm/scripts/build_executorch.sh
$ backends/arm/scripts/build_portable_kernels.sh --portable_kernels=OPS
$ backends/arm/scripts/build_quantized_ops_aot_lib.sh

2. Build

$ python3 -m examples.arm.aot_arm_compiler --target=ethos-u85-128 --delegate --quantize --so_library=PATH/libquantized_ops_aot_lib.so --model_name=MODEL

3. Build target executable ELF_FILE

$ backends/arm/scripts/build_executorch_runner.sh --pte=PTE_FILE --target=ethos-u85-128

4. Test target executable with FVP

$ backends/arm/scripts/run_fvp.sh --elf=ELF_FILE --target=ethos-u85-128

cc @digantdesai @freddan80 @per @oscarandersson8218

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/8460

• 📄 Preview Python docs built from this PR

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❌ 1 New Failure, 1 Pending, 1 Unrelated Failure

As of commit 34738e9 with merge base f0ef51c ():

NEW FAILURE - The following job has failed:

• Lint / lintrunner / linux-job (gh)
  >>> Lint for backends/cadence/aot/fuse_ops.py:

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest / macos / macos-job (gh) (trunk failure)
  exir/tests/test_joint_graph.py::TestJointGraph::test_joint_graph

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[zingo]

@digantdesai there is 2 files outside arm folders are they OK to merge? They are still kind of Arm files, related to arm github testing and the arm delegate guide. 😊

If/when this goes in there is a second patch waiting to be uploaded that add BundleIO testing to this flow so we get input/output verification on our FVP model tests 😊

Edit: Got feedback in other channels by Digant that it was OK to merge this.

[oscarandersson8218]

Looks good to me. CI failure should be unrelated.

[zingo]

Fails are unrealted