Arm backend: Remove stable-diffusion xfail

[oscarandersson8218]

Removes xfail in stable_diffusion/test_CLIPTextModelWithProjection.

cc @digantdesai @freddan80 @per @zingo @mansnils @Sebastian-Larsson @robell

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/18574

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❌ 3 New Failures, 1 Cancelled Job, 3 Unrelated Failures

As of commit 1f04aa6 with merge base 3d63ad8 ():

NEW FAILURES - The following jobs have failed:

• Lint / lintrunner-mypy (gh)
  >>> Lint for backends/arm/test/models/stable_diffusion/stable_diffusion_module_test_configs.py:
• trunk / test-arm-backend-vkml (test_pytest_ops_vkml) / linux-job (gh)
  RuntimeError: Command docker exec -t 40ff269fffbad6cb8403cac25485905132b3d19bd204daed45a7356588c4a6c3 /exec failed with exit code 1
• trunk / test-qnn-model (fp32, dl3) / linux-job (gh)
  RuntimeError: Command docker exec -t 7a363ad02520f8f2754d3d7bde9ec36ac1f88b02f07aa92a2c59eae86f2d139c /exec failed with exit code 1

CANCELLED JOB - The following job was cancelled. Please retry:

• periodic (gh)

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

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

• pull / unittest / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• trunk / unittest-release / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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[oscarandersson8218]

FAILED backends/arm/test/ops/test_permute.py::test_permute_vgf_quant[rank_4_large]caused by #18314