Integrate AUTO XPU service feature from external branch

[Copilot]

Details:

Integrated AUTO XPU service changes from https://github.com/hbhallaneo/openvino/tree/AUTO-xpu-service (commit b417fa2).

Core functionality:

• Device utilization monitoring via platform-specific APIs (Windows: XPU Info Service pipe, Linux: placeholder stubs)
• New ov::intel_auto::devices_utilization_threshold property maps device names to utilization thresholds
• AUTO plugin device selection now factors current load, selecting devices below configured thresholds

Implementation:

• Device monitors: src/common/util/src/monitors/{win,lin}/ for CPU and XPU utilization queries
• AUTO plugin: Enhanced select_device() to filter candidates by utilization before priority-based selection
• Python bindings: Support for threshold property in pyopenvino
• Tests: New SelectDeviceWithUtilizationTest suite for utilization-based selection logic

Example usage:

ov::Core core;
auto model = core.read_model("model.xml");
std::map<std::string, unsigned> thresholds = {{"CPU", 78}, {"GPU", 55}};
auto compiled = core.compile_model(
    model, "AUTO", 
    {ov::intel_auto::devices_utilization_threshold(thresholds)}
);

Conflict resolution:

• plugin.hpp: Preserved new import_model(ov::Tensor) overloads alongside get_device_utilization()
• select_device_test.cpp: Merged new utilization test suite with existing tests
• utils_tests.cpp: Kept both mul_overflow tests and new device_monitor test

Code cleanup (post-integration):

• Removed debug std::cout statements from device monitor implementations
• Removed unreachable returns after throw statements
• Fixed test assertion logic (incorrect boolean condition)
• Removed temporary diagnostic LOG_DEBUG statements

Tickets:

• N/A

AI Assistance:

• AI assistance used: yes
• Cherry-picked external commit, resolved 3-way merge conflicts in plugin.hpp/select_device_test.cpp/utils_tests.cpp, applied automated code review feedback to remove debug artifacts and fix test logic. Manual validation: verified git history integrity, reviewed conflict resolution strategy, confirmed all merge markers removed.

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