Arm backend: Refactor models to allow for TOSA 1.0

[SaoirseARM]

Summary

Update model unit tests to use the new test infrastructure pipeline.

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

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As of commit d45fe19 with merge base b73f9d5 ():
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[SaoirseARM]

@pytorchbot label ciflow/trunk

[SaoirseARM]

@pytorchbot label 'partner: arm'

[SaoirseARM]

@pytorchbot label "release notes: none"

[zingo]

@SaoirseARM This seem to get a model errror
FAILED backends/arm/test/models/test_dl3_arm.py::test_dl3_u85_BI - RuntimeError: Corstone simulation failed:
It seem to allocate to much memory :(

[zingo]

Rebased to get lintrunner to work and force a recheck to see that dl3 is still giving the error.

EDIT: A proper rebase with a fix for the test problem was merged right after my rebase so ignore this comment

[zingo]

Hm worder if we need to add something to rtol (or atol) also

FAILED backends/arm/test/models/test_dl3_arm.py::test_dl3_tosa_BI - AssertionError: Output 0 does not match reference output.
Given atol: 1.0, rtol: 0.001.
Output tensor shape: torch.Size([1, 21, 224, 224]), dtype: torch.float32
Difference: max: 1.0140552520751953, abs: 1.0140552520751953, mean abs error: 0.07422800362110138.
-- Model vs. Reference --
Numel: 1053696, 1053696
Median: -0.4148407280445099, -0.4148407280445099
Mean: 0.0011951494961977005, 0.0009040239383466542
Max: 7.881974220275879, 7.928067684173584
Min: -3.5952863693237305, -3.5952863693237305
= 1 failed, 62 passed, 4 skipped, 20 xfailed, 3 xpassed, 1373 warnings in 812.75s (0:13:32) =

[zingo]

Rebased after unrelated Arm test fixes