Fix memleak due to improper deletion of onnx::TypeProto wrapper in provider-bridge API (#26448)
### Description
There is a memory leak whenever an EP uses the provider-bridge API to
create a `std::unique_ptr<onnx::TypeProto>`. The `onnx::TypeProto` is
not properly deleted due to a missing `operator delete()` override for
the `TypeProto` wrapper class. This delete operator override is
necessary because the onnx library may use custom allocators.
Affected EPs:
Run `git grep -rn "TypeProto::Create()" onnxruntime/core/providers/`
- QNN EP: Happens when QNN EP creates an EPContext model. To reproduce,
run the `onnxruntime_provider_tests` with
`--gtest_filter=*ContextBinary*`.
-
https://github.com/microsoft/onnxruntime/blob/860d0853a6eefdf19e21b0e9982bde2ffbc8a65d/onnxruntime/core/providers/qnn/builder/onnx_ctx_model_helper.cc#L73.
- OpenVINO EP: Happens during QDQ stripping:
-
https://github.com/microsoft/onnxruntime/blob/860d0853a6eefdf19e21b0e9982bde2ffbc8a65d/onnxruntime/core/providers/openvino/qdq_transformations/qdq_stripping.cc#L76
-
https://github.com/microsoft/onnxruntime/blob/860d0853a6eefdf19e21b0e9982bde2ffbc8a65d/onnxruntime/core/providers/openvino/qdq_transformations/qdq_stripping.cc#L473
-
https://github.com/microsoft/onnxruntime/blob/860d0853a6eefdf19e21b0e9982bde2ffbc8a65d/onnxruntime/core/providers/openvino/qdq_transformations/qdq_stripping.cc#L654
- NV EP:
-
https://github.com/microsoft/onnxruntime/blob/860d0853a6eefdf19e21b0e9982bde2ffbc8a65d/onnxruntime/core/providers/nv_tensorrt_rtx/nv_execution_provider_helper.cc#L213
- VitisAI EP:
-
https://github.com/microsoft/onnxruntime/blob/860d0853a6eefdf19e21b0e9982bde2ffbc8a65d/onnxruntime/core/providers/vitisai/imp/node_arg.cc#L94
### Motivation and Context
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