Enable Gemma3 1B on ExecuTorch

[jackzhxng]

Sample xnnpack 8da4w export:

python -m extension.llm.export.export_llm
--config examples/models/gemma3/config/gemma3_xnnpack_q8da4w.yaml
+base.params="examples/models/gemma3/config/1b_config.json"
+export.output_name="gemma3_1b_x_8da4w.pte"

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12048

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❗ 1 Active SEVs

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• VolumeLimitExceeded Issue for linux.2xlarge and linux.4xlarge

❌ 19 New Failures

As of commit 6d6fe0f with merge base bfd4957 ():

NEW FAILURES - The following jobs have failed:

• pull / android / build-llm-demo / linux-job (gh)
  RuntimeError: Command docker exec -t 65aa9b0456f133078ddf8d365ee33b3aea486da8e8dd844e58deef30c7e72c46 /exec failed with exit code 1
• pull / test-eval_llama-mmlu-linux / linux-job (gh)
  AttributeError: 'TransformerBlock' object has no attribute 'post_attention_norm'. Did you mean: 'attention_norm'?
• pull / test-eval_llama-wikitext-linux / linux-job (gh)
  AttributeError: 'TransformerBlock' object has no attribute 'post_attention_norm'. Did you mean: 'attention_norm'?
• pull / test-llama_runner_eager-linux / linux-job (gh)
  RuntimeError: Command docker exec -t ec14a872e11e0b9207077a985e861e79e207ab2d42906b71f52b916d76f7320e /exec failed with exit code 1
• pull / test-llama-runner-linux (bf16, custom, linux.2xlarge, executorch-ubuntu-22.04-clang12) / linux-job (gh)
  RuntimeError: Command docker exec -t ad9fa548a3d45844ab0d456e5bd484ccec0ca68093fd7f29cffb7d2a911e7534 /exec failed with exit code 1
• pull / test-llama-runner-linux (fp32, xnnpack+custom+qe, linux.2xlarge, executorch-ubuntu-22.04-clang12) / linux-job (gh)
  RuntimeError: Command docker exec -t 6c28cef091d787672a124cc57c2f5145cf9d928fc63b61036ec29b2ee5ce59da /exec failed with exit code 1
• pull / test-llama-runner-linux (fp32, xnnpack+custom+qe, linux.arm64.2xlarge, executorch-ubuntu-22.04-gc... / linux-job (gh)
  RuntimeError: Command docker exec -t d49fdc7d57a72aaf6890666a64de2b35f39595842b5aaa0b0d952ad7ca359748 /exec failed with exit code 1
• pull / test-llama-runner-linux (fp32, xnnpack+custom+quantize_kv, linux.2xlarge, executorch-ubuntu-22.04... / linux-job (gh)
  RuntimeError: Command docker exec -t 0fed579967cdb6b5060c83603e49a11fe623eee06cabbba652730573d2b57716 /exec failed with exit code 1
• pull / test-llama-runner-linux (fp32, xnnpack+custom+quantize_kv, linux.arm64.2xlarge, executorch-ubuntu... / linux-job (gh)
  RuntimeError: Command docker exec -t b89230b16f108d4faa565e01c6eb402267bf80face4c02cf7df4d466c72cc0f1 /exec failed with exit code 1
• pull / test-llama-runner-linux (fp32, xnnpack+quantize_kv, linux.2xlarge, executorch-ubuntu-22.04-clang12) / linux-job (gh)
  RuntimeError: Command docker exec -t 6b83ecd049ddc45937a9be8491aa26ccbafefe420a916461381a5750e446230f /exec failed with exit code 1
• pull / test-llama-runner-linux (fp32, xnnpack+quantize_kv, linux.arm64.2xlarge, executorch-ubuntu-22.04-... / linux-job (gh)
  RuntimeError: Command docker exec -t f225ba65c416b92b09bcf383dd7cc68c02da0429ad2396e8283903ac95b56b3d /exec failed with exit code 1
• pull / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh)
  RuntimeError: Command docker exec -t dcf9e7c6967186590afb27f8daf9bd9d38118599ede6ff41f3ddb59aeaae942e /exec failed with exit code 1
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh)
  RuntimeError: Command docker exec -t 3532e2513c1fe31b40b70cfb0b8f29f263a29ca0b0a5c9dcc3d9c0445b0a699c /exec failed with exit code 1
• pull / test-llava-runner-linux / linux-job (gh)
  test_prefill_logits
• pull / test-models-linux (phi_4_mini, portable, linux.4xlarge.memory) / linux-job (gh)
  RuntimeError: Command docker exec -t 1c03177b5b6fc9dc68d5844c0faaaae0130786e13c7da2b3bdc1c98d82ccf917 /exec failed with exit code 1
• pull / unittest / linux / linux-job (gh)
  examples/models/llama/tests/test_export_llama_lib.py::ExportLlamaLibTest::test_has_expected_ops_and_op_counts
• pull / unittest / macos / macos-job (gh)
  examples/models/llama/tests/test_export_llama_lib.py::ExportLlamaLibTest::test_has_expected_ops_and_op_counts
• pull / unittest-editable / linux / linux-job (gh)
  backends/xnnpack/test/ops/test_conv1d.py::TestConv1d::test_qs8_conv1d_batchnorm_seq
• pull / unittest-editable / macos / macos-job (gh)
  examples/models/llama/tests/test_export_llama_lib.py::ExportLlamaLibTest::test_has_expected_ops_and_op_counts

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[cccclai]

@haowhsu-quic @winskuo-quic @chunit-quic @DannyYuyang-quic @shewu-quic fyi the changes to enable Gemma3 1B on the cpu path. Maybe something can be shared across.