[quantization] Introduce wrapper for Qwen3VLForConditionalGeneration

[dvsav]

This change introduces QuantQwen3VLForConditionalGeneration wrapper to support post-training quantization of Qwen3VLForConditionalGeneration module.

Why?

Qwen3VLForConditionalGeneration is an essential part of Qwen model.
Trying to quantize Qwen3VLForConditionalGeneration via PTQ generates exception PTQQuantizer: no quantization wrapper for Qwen3VLForConditionalGeneration.

What

This change introduces:

• Class QuantQwen3VLForConditionalGeneration (tico/quantization/wrapq/wrappers/qwen_vl/quant_for_conditional_generation.py).
• Unit tests: class TestQuantQwen3VLForConditionalGeneration (test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py).
• New entry in _CORE_MODULES (tico/quantization/wrapq/wrappers/registry.py).
• Example of Qwen3VLForConditionalGeneration quantization and conversion to Circle (tico/quantization/wrapq/examples/qwen/quantize_for_conditional_generation.py).

Unit Tests

Unit tests results with coverage information:

$ coverage run -m pytest test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py -v
================================================================== test session starts ==================================================================
platform linux -- Python 3.10.12, pytest-8.4.0, pluggy-1.6.0 -- /home/d.savchenkov/myenv/bin/python3
cachedir: .pytest_cache
rootdir: /home/d.savchenkov/TICO
configfile: pyproject.toml
plugins: anyio-4.12.0, mock-3.15.1, xdist-3.7.0, cov-6.2.1
collected 7 items                                                                                                                                       

test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py::TestQuantQwen3VLForConditionalGeneration::test_forward_text_only                   PASSED [ 14%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py::TestQuantQwen3VLForConditionalGeneration::test_forward_with_both_images_and_videos PASSED [ 28%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py::TestQuantQwen3VLForConditionalGeneration::test_forward_with_images                 PASSED [ 42%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py::TestQuantQwen3VLForConditionalGeneration::test_forward_with_videos                 PASSED [ 57%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py::TestQuantQwen3VLForConditionalGeneration::test_mode_transitions                    PASSED [ 71%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py::TestQuantQwen3VLForConditionalGeneration::test_registration_in_registry            PASSED [ 85%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_for_conditional_generation.py::TestQuantQwen3VLForConditionalGeneration::test_wraps_submodules                    PASSED [100%]

============================================================= 7 passed, 2 warnings in 8.48s =============================================================

Coverage info (irrelevant files skipped):

$ coverage report -m
Name                                                                           Stmts   Miss  Cover   Missing
------------------------------------------------------------------------------------------------------------
...
tico/quantization/wrapq/wrappers/nn/quant_linear.py                               29      0   100%
...
tico/quantization/wrapq/wrappers/qwen_vl/quant_for_conditional_generation.py      23      0   100%
tico/quantization/wrapq/wrappers/qwen_vl/quant_model.py                          215     52    76%   114, 120, 163, 199, 277-281, 348-363, 427-436, 499-576, 620-625
tico/quantization/wrapq/wrappers/qwen_vl/quant_text_attn.py                      136      5    96%   196-197, 201-203
tico/quantization/wrapq/wrappers/qwen_vl/quant_text_decoder_layer.py              42      0   100%
tico/quantization/wrapq/wrappers/qwen_vl/quant_text_mlp.py                        43      0   100%
tico/quantization/wrapq/wrappers/qwen_vl/quant_text_model.py                     130      8    94%   248, 254-256, 260, 278, 282, 285-286
tico/quantization/wrapq/wrappers/qwen_vl/quant_vision_attn.py                    105      0   100%
tico/quantization/wrapq/wrappers/qwen_vl/quant_vision_block.py                    42      0   100%
tico/quantization/wrapq/wrappers/qwen_vl/quant_vision_mlp.py                      33      0   100%
tico/quantization/wrapq/wrappers/qwen_vl/quant_vision_model.py                   173      6    97%   166, 173, 180, 195, 279, 452
tico/quantization/wrapq/wrappers/qwen_vl/quant_vision_patch_embed.py              25      0   100%
tico/quantization/wrapq/wrappers/qwen_vl/quant_vision_patch_merger.py             36      0   100%
tico/quantization/wrapq/wrappers/registry.py                                      36      1    97%   260
...
------------------------------------------------------------------------------------------------------------
TOTAL                                                                          11720   6838    42%

Script for testing quantization and conversion to Circle

$ python tico/quantization/wrapq/examples/qwen/quantize_for_conditional_generation.py
┌───────────── Quantization Error Summary ─────────────
│ Mean |diff|: 0.022036
│ PEIR       : 16.040346 %
└──────────────────────────────────────────────────────
     ┌───────────────────────────────────────────┐
 0.72┤                                           │
     │                                    •••••  │
 0.48┤                                 •••••••   │
     │                              •••••••      │
     │                          •••••••••        │
 0.24┤                     • ••••••••••          │
     │                     ••••••••••            │
-0.00┤                  •••••••••••              │
     │             •••••••••••• •                │
     │            ••••••••••  •                  │
-0.24┤          •••••••••••                      │
     │      • ••••••••                           │
-0.48┤      ••••••••                             │
     │    ••••••                                 │
     │  ••••                                     │
-0.72┤                                           │
     └┬──────────┬─────────┬──────────┬─────────┬┘
    -0.72      -0.36     -0.00      0.36     0.72 

[QuantCheck] WARNING: 34 nodes without qparam detected (see logs).
Circle model saved as 'qwen3vl_for_conditional_generation.q.circle'