feat: preprocessing in python for NPU

[mgumowsk]

What does this PR do?

Fixes #408

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[Copilot]

Pull Request Overview

This PR adds preprocessing support in Python for NPU devices to improve compatibility and performance. The changes implement Python-based preprocessing pipelines as an alternative to embedded preprocessing for NPU devices, while also refactoring shared preprocessing logic and fixing method calls for label handling.

• Adds NPU-specific Python preprocessing pipeline setup
• Refactors ONNX adapter to use shared preprocessing utilities
• Fixes label access methods in tiler classes

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/model_api/adapters/utils.py	Adds shared preprocessing pipeline setup function and layout change utility
src/model_api/adapters/openvino_adapter.py	Implements NPU device detection, dynamic input reshaping, and Python preprocessing
src/model_api/adapters/onnx_adapter.py	Refactors to use shared preprocessing utilities and updates copyright year
src/model_api/models/anomaly.py	Adds NPU-specific dynamic shape handling and image resizing in preprocessing
src/model_api/tilers/detection.py	Updates label access to use get_label_name method
src/model_api/tilers/instance_segmentation.py	Updates label access to use get_label_name method

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