Qwen lora quantize test

[lucylq]

Add test for quantized lora. Expected file sizes:

full file:
-rw-r--r-- 1 lfq users 3051988096 Dec 10 11:34 qwen_lora_math_full.pte

program-data separated:
-rw-r--r-- 1 lfq users 2388436736 Dec  9 12:20 qwen_foundation.ptd
-rw-r--r-- 1 lfq users   40430544 Dec  9 12:20 qwen_lora_math.ptd
-rw-r--r-- 1 lfq users     810064 Dec  9 12:20 qwen_lora_math.pte

quantized:
-rw-r--r-- 1 lfq users  962094448 Dec 10 14:16 qwen_foundation_lora_q.ptd
-rw-r--r-- 1 lfq users   40430544 Dec 10 14:16 qwen_lora_math_q.ptd
-rw-r--r-- 1 lfq users     874912 Dec 10 14:16 qwen_lora_math_q.pte

quantized, no lora adapter:
-rw-r--r-- 1 lfq users  962094448 Dec 10 13:52 qwen_foundation_q.ptd
-rw-r--r-- 1 lfq users     635552 Dec 10 13:52 qwen_q.pte

Quantized lora weights are the same as non-quantized, as the rank is 16, and quantization for xnnpack works for group_size >= 32

[pytorch-bot]

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❌ 1 New Failure, 2 Unrelated Failures

As of commit 489a942 with merge base c3a53f3 ():

NEW FAILURE - The following job has failed:

• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command docker exec -t a0f3abdf4f25c7d9815803fa4499c9bbe4c23a20a70fa73f2c28f616a6d48043 /exec failed with exit code 139

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• trunk / test-models-linux-aarch64 (vit, xnnpack-quantization-delegation, linux.arm64.2xlarge) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• pull / android / run-emulator (gh) (#16137)
  Timeout waiting for emulator to boot.

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