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Description

• Use std::vector as the priority queue’s backing container in KahnsTopologicalSort, avoiding the GCC 14 -Werror=uninitialized warning triggered by moving an InlinedVector.
• Retain the heap-based traversal and the session-creation optimizations from PR Speed up session creation #33939.

Motivation and Context

The Linux MinSizeRel build with exceptions disabled failed while compiling graph.cc: GCC 14 treated an Abseil InlinedVector move-constructor warning as an error. This change avoids that move while preserving the priority queue’s ordering.

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[Copilot]

🟢 Approval recommended

No active review issues remain for the GCC 14 build fix and related session-creation optimizations.

No open issues 🎉

What changed in this PR

Addresses the GCC 14 build failure in graph topological sorting while retaining the session-creation optimizations from PR #33939.

Changes:

• Uses a std::vector-backed priority queue to avoid the InlinedVector move warning while preserving heap-based traversal and ordering.
• Removes redundant consumer lookups during constant sharing.
• Retrieves tensor element types directly from node type metadata in the allocation planner.

File	Description
onnxruntime/​core/​optimizer/​constant_sharing.cc	Relies on consumer-set deduplication instead of copying and searching consumers.
onnxruntime/​core/​graph/​graph.cc	Uses a vector-backed binary heap for efficient topological traversal.
onnxruntime/​core/​framework/​allocation_planner.cc	Avoids indirect type conversion when retrieving tensor element types.

_{Review effort: Balanced}