[NPU] Support NPUW for text-embedding models

[mengweiguo]

Description

The duplicate PR#3088 in master branch.

CVS-###

Fixes #(issue)

Checklist:

• Tests have been updated or added to cover the new code.
• This patch fully addresses the ticket.
• I have made corresponding changes to the documentation.

[Copilot]

Pull request overview

This PR adds support for the Qwen3 embedding model release, enhancing text embedding functionality with improved configuration handling and NPU device support.

Changes:

• Added pad_to_max_length configuration option for text embeddings
• Fixed typo in function name from get_argprser to get_argparser
• Refactored NPU compilation logic to support text embedding models with dynamic inputs
• Added comprehensive test coverage for Qwen3 embedding model with various pooling types and configurations

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tools/llm_bench/task/text_embeddings.py	Updated tokenizer configuration to support pad_to_max_length parameter
tools/llm_bench/llm_bench_utils/ov_utils.py	Reorganized configuration logic and fixed padding_side parameter name
tools/llm_bench/llm_bench_utils/model_utils.py	Added emb_pad_to_max_length to model arguments
tools/llm_bench/benchmark.py	Fixed typo in get_argparser function name and added embedding_pad_to_max_length argument
tests/python_tests/test_rag.py	Added device and properties parameters to run_text_embedding_genai, parameterized validation threshold, and added extensive NPU tests
src/cpp/src/utils.hpp	Added declaration for compile_decoder_for_npu_text_embedding function
src/cpp/src/utils.cpp	Refactored NPU compilation into reusable functions and added text embedding specific configuration
src/cpp/src/rag/text_embedding_utils.hpp	Created new utility header for text embedding operations
src/cpp/src/rag/text_embedding_utils.cpp	Implemented utility functions for model reshaping and post-processing
src/cpp/src/rag/text_embedding_pipeline.cpp	Refactored to use utility functions and added NPU support with separate post-processing
src/cpp/src/rag/npu/text_embedding_pipeline.hpp	Added NPU-specific text embedding pipeline declarations
src/cpp/src/rag/npu/text_embedding_pipeline.cpp	Implemented NPU-specific text embedding pipeline creation
src/cpp/include/openvino/genai/rag/text_embedding_pipeline.hpp	Added documentation for NPU dynamic prompt input properties

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[mengweiguo]

Node.js bindings tests on macOS failure is expected as PR#3227 is not merged in release branch.