Cortex_m backend: Add cortex_m tester + test_add

[AdrianLundell]

Note that tests are currently failing, comparing for example the call to arm_elementwise_add_s8 in op_quantized_add.cpp

executorch/backends/cortex_m/ops/op_quantized_add.cpp

Line 88 in ab31007

arm_cmsis_nn_status status = arm_elementwise_add_s8(

with the definition in CMSIS-NN
https://github.com/ARM-software/CMSIS-NN/blob/88f1982a69c00ed13dd633a63da1009c48abbb4d/Include/arm_nnfunctions.h#L1923 it seems that the args are listed in the wrong order. This will be fixed in a future patch.

Minor fixes to get this to work:

• Add init file to make test names unique
• Update conftest to not crash is_option_enabled for tests running from external folder

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

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❌ 4 New Failures

As of commit 364ef50 with merge base ab31007 ():

NEW FAILURES - The following jobs have failed:

• pull / test-qnn-wheel-packages-linux (3.10) / linux-job (gh)
  RuntimeError: Command docker exec -t 5bf833695a5ce03c4ebf0a4e9f1abef0a3f0a8094acac347e0edf44c5db0d3b6 /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.11) / linux-job (gh)
  RuntimeError: Command docker exec -t 3ab0ae2f090d0f1277495b7660bdc04a5fd455055687c002d84899cdab59dc73 /exec failed with exit code 1
• pull / test-qnn-wheel-packages-linux (3.12) / linux-job (gh)
  RuntimeError: Command docker exec -t 17271dffee119ec293fe3ab8d37afe3fa14f26e07b2423821547b812ed6f43c6 /exec failed with exit code 1
• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t db4f7c02173c15978bed5226b9e04a138edd419b055604be902213bd82f22af7 /exec failed with exit code 1

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[digantdesai]

Suggested change

	class SelfAdd(torch.nn.Module):
	class SelfCortexMAdd(torch.nn.Module):

[AdrianLundell]

I added CortexM as a prefix to all models here instead, I prefer to keep to one same naming scheme and not put the target description part of the name (CortexM) in the middle of the model description part (SelfAdd).

[digantdesai]

LGTM, let's get the ball rolling.. thanks.

[AdrianLundell]

I have not added buck targets in this PR since it is a new structure which makes it difficult to guess how it should look, but if you add it to this one I can follow that pattern for upcoming PR:s.

[digantdesai]

@psiddh - do you want to introduce buck targets here?

[psiddh]

@psiddh - do you want to introduce buck targets here?

@AdrianLundell Once you land this PR , I can add the buck targets to it as a follow up