[EP Plugin Adapter] support LoggingManager::HasDefaultLogger()

[fs-eire]

Description

Add support for LoggingManager::HasDefaultLogger().

[Copilot]

Pull request overview

This PR updates the EP plugin adapter logging surface to expose LoggingManager::HasDefaultLogger() (mirroring the main ORT logging API shape) so plugin EP code can query whether a default logger is available.

Changes:

• Introduce onnxruntime::ep::adapter::LoggingManager with HasDefaultLogger() and move default-logger management off Logger.
• Update the adapter’s LOGS_DEFAULT_CATEGORY macro to use LoggingManager::DefaultLogger().
• Expose LoggingManager via EP-specific using declarations in include/onnxruntime/ep/adapters.h.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
include/onnxruntime/ep/adapters.h	Exposes LoggingManager in the EP plugin adapter’s logging namespace aliases.
include/onnxruntime/ep/adapter/logging.h	Adds adapter LoggingManager (with HasDefaultLogger) and routes default logging macros through it.

Comments suppressed due to low confidence (1)

include/onnxruntime/ep/adapter/logging.h:47

• LoggingManager::DefaultLogger() dereferences instance_ without checking it is initialized, which is undefined behavior if logging is used before CreateDefaultLogger() is called. Also, CreateDefaultLogger() overwrites instance_ without deleting/guarding against an existing logger, which can leak if called more than once. Consider matching ::onnxruntime::logging::LoggingManager behavior: throw (or otherwise fail fast) if instance_ is null in DefaultLogger(), and either throw if instance_ is already set or delete/require DestroyDefaultLogger() before re-creating.

  static bool HasDefaultLogger() { return nullptr != instance_; }
  static const Logger& DefaultLogger() { return *instance_; }
  static void CreateDefaultLogger(const OrtLogger* logger) {
    instance_ = new Logger(logger);
  }

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