Update DIV for OpenVINO backend

[zhaixuejun1993]

This pull request enhances the OpenVINO backend's handling of division operations in ggml-openvino by introducing a special case for the SiLU (Sigmoid Linear Unit) division pattern and improving numerical stability for certain compute paths. The changes aim to optimize performance and prevent precision-related issues, especially on GPU backends.

Pattern recognition and optimization:

• Added detection of the SiLU division pattern (silu(x) / x) in translate_div and replaced it with a direct sigmoid operation for efficiency and accuracy. [1] [2]

Numerical precision improvements:

• Marked reciprocal/divide subgraphs and their output conversions as precision-sensitive when using FP32 computation to prevent unwanted downcasting to FP16, which can cause overflows on small values (e.g., in silu(x)/x for certain models).

Dependency and header updates:

• Included additional OpenVINO headers (precision_sensitive_attribute.hpp, multiply.hpp, sigmoid.hpp) and the main ggml.h header to support the new functionality and pattern recognition logic.## Overview

Additional information

Requirements

• I have read and agree with the contributing guidelines
• AI usage disclosure: