[quantization] Introduce wrapper for Qwen3VLModel

[dvsav]

This change introduces QuantQwen3VLModel wrapper to support post-training quantization of Qwen3VLModel module.

Why?

Qwen3VLModel is an essential part of Qwen model.
Trying to quantize Qwen3VLModel via PTQ generates exception PTQQuantizer: no quantization wrapper for Qwen3VLModel.

What

This change introduces:

• Class QuantQwen3VLModel (tico/quantization/wrapq/wrappers/qwen_vl/quant_model.py).
• Unit tests: class TestQuantQwen3VLModel (test/quantization/wrapq/wrappers/qwen_vl/test_quant_model.py) - skipped if transformers package is not installed.
• New entry in _CORE_MODULES (tico/quantization/wrapq/wrappers/registry.py).
• Example of Qwen3VLModel quantization and conversion to Circle (tico/quantization/wrapq/examples/qwen/quantize_qwen_model.py).

Unit Tests

Unit tests results with coverage information:

$ coverage run -m pytest test/quantization/wrapq/wrappers/qwen_vl/test_quant_model.py -v

Coverage info (irrelevant files skipped):

$ coverage report -m
Name                                                                   Stmts   Miss  Cover   Missing
----------------------------------------------------------------------------------------------------
...
...
----------------------------------------------------------------------------------------------------
TOTAL                                                                  10170   6520    36%

Script for testing quantization and conversion to Circle

$ python3 tico/quantization/wrapq/examples/qwen/quantize_qwen_model.py