[EP ABI] Sample QDQ utilities

[adrianlizarraga]

Description

Provides a sample header-only utility file to group OrtNode instances into NodeUnit instances (for QDQ models).

#define ORT_EP_UTILS_QDQ_UTILS_IMPL
#include "qdq_utils.h"

OrtStatus* ORT_API_CALL GetCapabilityImpl(OrtEp* this_ptr, const OrtGraph* ort_graph,
                                          OrtEpGraphSupportInfo* graph_support_info) {
  std::vector<std::unique_ptr<OrtEpUtils::QDQ::NodeUnit>> node_units;
  std::unordered_map<const OrtNode*, const OrtEpUtils::QDQ::NodeUnit*> node_unit_map;
  
  // Group all nodes into NodeUnit instances.
  Ort::Status status = OrtEpUtils::QDQ::GetAllNodeUnits(graph, logger, node_units, node_unit_map);
  // ...
}

Motivation and Context

Make it easier to port existing EPs to use the new EP ABI.