[quantization] Introduce wrapper for Qwen3VLTextDecoderLayer

[dvsav]

This change introduces QuantQwen3VLTextDecoderLayer wrapper to support post-training quantization of Qwen3VLTextDecoderLayer module.

Why?

Qwen3VLTextDecoderLayer is an essential part of Qwen model.
Trying to quantize Qwen3VLTextDecoderLayer via PTQ generates exception PTQQuantizer: no quantization wrapper for Qwen3VLTextDecoderLayer.

What

This change introduces:

• Class QuantQwen3VLTextDecoderLayer (tico/quantization/wrapq/wrappers/qwen_vl/quant_text_decoder_layer.py).
• Unit tests: class TestQuantQwen3VLTextDecoderLayer (test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py) - skipped if transformers package is not installed.
• New entry in _CORE_MODULES (tico/quantization/wrapq/wrappers/registry.py).
• Example of Qwen3VLTextDecoderLayer quantization and conversion to Circle (tico/quantization/wrapq/examples/qwen/quantize_text_decoder_layer.py).

Unit Tests

Unit tests results with coverage information:

$ coverage run -m pytest test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.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 8 items

test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py::TestQuantQwen3VLTextDecoderLayer::test_different_batch_sizes            PASSED [ 12%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py::TestQuantQwen3VLTextDecoderLayer::test_forward_diff                     PASSED [ 25%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py::TestQuantQwen3VLTextDecoderLayer::test_mode_transitions                 PASSED [ 37%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py::TestQuantQwen3VLTextDecoderLayer::test_observer_count                   PASSED [ 50%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py::TestQuantQwen3VLTextDecoderLayer::test_output_shape                     PASSED [ 62%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py::TestQuantQwen3VLTextDecoderLayer::test_per_module_override              PASSED [ 75%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py::TestQuantQwen3VLTextDecoderLayer::test_registration_in_registry         PASSED [ 87%]
test/quantization/wrapq/wrappers/qwen_vl/test_quant_text_decoder_layer.py::TestQuantQwen3VLTextDecoderLayer::test_residual_connection_preservation PASSED [100%]

======================================================== 8 passed, 2 warnings in 80.06s (0:01:20) ========================================================

Coverage info (irrelevant files skipped):

$ coverage report -m

Name                                                                    Stmts   Miss  Cover   Missing
-----------------------------------------------------------------------------------------------------
...
tico/quantization/wrapq/wrappers/qwen_vl/quant_text_decoder_layer.py       42      0   100%
...
-----------------------------------------------------------------------------------------------------
TOTAL                                                                   11272   7196    36%

Script for testing quantization and conversion to Circle

$ python tico/quantization/wrapq/examples/qwen/quantize_text_decoder_layer.py
┌───────────── Quantization Error Summary ─────────────
│ Mean |diff|: 0.018236
│ PEIR       : 1.069503 %
└──────────────────────────────────────────────────────
    ┌────────────────────────────────────────────┐
 4.5┤                                            │
    │                                         •  │
    │                                      •••   │
 3.0┤                                    •••     │
    │                                  •••       │
    │                                •••         │
    │                             ••••           │
 1.5┤                           ••••             │
    │                         ••••               │
    │                       ••••                 │
 0.0┤                     ••••                   │
    │                   ••••                     │
    │                 ••••                       │
    │               ••••                         │
-1.5┤             ••••                           │
    │           ••••                             │
    │         •••                                │
-3.0┤       •••                                  │
    │     •••                                    │
    │   •••                                      │
    │  •                                         │
-4.5┤                                            │
    └┬──────────┬──────────┬─────────┬──────────┬┘
   -4.5       -2.3        0.0       2.3       4.5 

Circle model saved as 'qwen3vl_text_decoder_layer.q.circle'

[mhs4670go]

@dvsav Seems CI test failed.

[dvsav]

@dvsav Seems CI test failed.

Hi @mhs4670go,
Yes, indeed. I've fixed it now.

[mhs4670go]

Peak Error to Interval ratio. Seems other codes have mistakes. Let's fix them at once in another PR.

[mhs4670go]

LGTM