Arm backend: Bump tosa version to remove mlplatform dependencies

[ArmRyan]

The only change with this version is that submodules will
no longer point to mlplatform and will instead point to gitlab.

Change-Id: I99e78b9401eaffa2b3e4ae8e840c84bd69ac5ab2

cc @freddan80 @per @zingo @oscarandersson8218 @digantdesai

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/14818

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❌ 2 New Failures, 1 Pending, 1 Unrelated Failure

As of commit a29c421 with merge base 3b16bc1 ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 61702459f21467b0f6ba7812fd4c91eedf58b6bf93f2dfcb9abecf1a352753ff /exec failed with exit code 1
• trunk / unittest-release / macos / macos-job (gh)
  export/tests/test_target_recipes.py::TestTargetRecipes::test_linear_model

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

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

• Apple / build-demo-ios / macos-job (gh) (trunk failure)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 74

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