Install accelerate for the Samsung model tests

[psiddh]

Fixes test-samsung-models-linux, red on main since the job started running on Sep 14.

The bug

test_mobilebert_qat_a8w8 constructs a transformers TrainingArguments, which requires
accelerate>=1.1.0. The job installs only evaluate, so:

ImportError: Using the `Trainer` with `PyTorch` requires `accelerate>=1.1.0`

It is the sole error in the suite, identically, on every affected commit:

Commit	Result
f3c08fcf35	Ran 12 tests ... FAILED (errors=1)
4798a676c3	Ran 12 tests ... FAILED (errors=1)
500849ba5b	Ran 12 tests ... FAILED (errors=1)
cfc96cc0e2	Ran 12 tests ... FAILED (errors=1)
026ca3fff3	Ran 12 tests ... FAILED (errors=1)

accelerate appears nowhere in the job logs, so it is absent rather than stale — but the pin is
still the right form, because transformers raises the same error for a too-old version.

Why it matters beyond the test

The non-zero exit propagates: unittest exits 1 → the script runs under set -ex →
run_with_env_secrets.py raises → the job fails → the trunk workflow concludes failure. trunk
is in update-viablestrict's requires list, so the commit is disqualified and viable/strict has
not advanced since Sep 14. This is one of two blockers; the other is the parallel_for empty-range
bug, fixed separately in #22869. Both are needed — each independently reddens trunk.

Verification

Honest scope: I verified the diagnosis, not the fix. The sole error is identical across five
commits and accelerate is never installed in the job. I cannot run this job — it needs the
Samsung device and SAMSUNG_AI_LITECORE_KEY — so the one-liner itself is untested. trunk.yml
parses and lintrunner is clean.

One note for reviewers: the [CDI: ERROR] only support axis as 1 / OP LOGSOFTMAX lines in the log
appear after FAILED (errors=1). They are teardown noise from a passing test, not a second
failure.

cc @digantdesai

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Authored with Claude Code.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/22870

• 📄 Preview Python docs built from this PR

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⏳ 1 Pending, 3 Unrelated Failures

As of commit 66f1852 with merge base 63d5e55 ():

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

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

• trunk / unittest-release / linux / linux-job (gh) (trunk failure)
  [ FAILED ] ParallelTestWithOrWithoutThreadpool/ParallelTest.NestedCallsPreserveOuterThreadNumber/1, where GetParam() = false
• trunk / unittest-release / macos / macos-job (gh) (trunk failure)
  [ FAILED ] ParallelTestWithOrWithoutThreadpool/ParallelTest.NestedCallsPreserveOuterThreadNumber/1, where GetParam() = false
• trunk / unittest-release / windows / windows-job (gh) (trunk failure)
  [ FAILED ] ParallelTestWithOrWithoutThreadpool/ParallelTest.NestedCallsPreserveOuterThreadNumber/1, where GetParam() = false

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[Copilot]

🟢 Approval recommended

The required test dependency is added with no unresolved review issues.

Pull request overview

Adds the missing accelerate>=1.1.0 dependency required by Samsung MobileBERT QAT tests.

Changes:

• Installs accelerate alongside evaluate.
• Documents the dependency requirement.

File summaries

File	Description
.github/workflows/trunk.yml	Updates Samsung model-test dependencies.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Lite

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