Make cache_dir and num_stream options session-local

[mklimenk]

This is a follow-up PR to #782, that moved most of the options from being set globally (per-process) to locally (per-model).
It is required to properly enable parallel session creation of multiple models with different set of options for each model.

https://jira.devtools.intel.com/browse/CVS-169874

[mklimenk]

@MayureshV1 could you please review it?

[Copilot]

Pull Request Overview

This PR refactors cache directory and number of streams configuration from global (per-process) settings to session-local (per-model) settings in the OpenVINO provider. This change enables parallel creation of multiple models with different configuration options.

• Removes global SetCache and SetStreams methods from the OVCore class
• Updates EnableCaching and EnableStreams methods to accept and populate a device configuration map parameter
• Shifts from setting properties globally on the core to setting them locally via device configuration

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
ov_interface.h	Removes global SetCache and SetStreams method declarations from OVCore
ov_interface.cc	Removes global SetCache and SetStreams method implementations from OVCore
basic_backend.h	Updates EnableCaching and EnableStreams method signatures to accept device config parameter
basic_backend.cc	Refactors EnableCaching and EnableStreams to populate device config instead of setting global properties

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[MayureshV1]

This implementation looks good and would make the existing provider options thread safe.

The same two provider options: cache_dir and num_streams are OV properties and can be set using load_config provider option.

[preetha-intel]

@mklimenk As this is refactoring the properties to set cache and num streams, can it all be broght into the same function , "PopulateConfigValue" instead of seperate calls which does populate the same map.

onnxruntime/onnxruntime/core/providers/openvino/backends/basic_backend.cc

Line 293 in 4d4d29b

PopulateConfigValue(device_config);

It can also be loaded from OV config. Can that be validated as well?

[preetha-intel]

Consolidate seperate function calls into single PopulateConfigValue

[preetha-intel]

Consolidate seperate function calls into single PopulateConfigValue

Can be taken as a follow up as its only cosmetic

Can be added as a follow up