examples/qwen3: match config with optimum flow

[digantdesai]

Sanity checked both flows on 1.0-rc3 and S24

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15239

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❌ 1 New Failure, 1 Cancelled Job, 4 Unrelated Failures

As of commit 2fc480d with merge base 6f7d15e ():

NEW FAILURE - The following job has failed:

• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t a24344b4a7e697348ac0d2aa5619143bb268e4e8091a00044881225fc00b0f15 /exec failed with exit code 1

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

• pull / test-binary-size-linux-gcc / linux-job (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 / test-openvino-linux / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / test-setup-linux-gcc / linux-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / unittest / linux / linux-job (gh) (trunk failure)
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)

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