Microsoft Proprietary License in my_execution_provider.cc/h

### Describe the issue

The _onnxruntime/test/testdata/custom_execution_provider_library/my_execution_provider.cc/h_ contains a Microsoft Proprietary License, see https://github.com/microsoft/onnxruntime/blob/main/onnxruntime/test/testdata/custom_execution_provider_library/my_execution_provider.cc
`
// Copyright (c) Microsoft Corporation. All rights reserved.
// Confidential and Proprietary.
`
The ONNX Runtime is distributed under MIT License.

### To reproduce

N/A

### Urgency

_No response_

### Platform

Other / Unknown

### OS Version

N/A

### ONNX Runtime Installation

Other / Unknown

### ONNX Runtime Version or Commit ID

main: 04a8f50 ; tag: 1.15.0

### ONNX Runtime API

Other / Unknown

### Architecture

Other / Unknown

### Execution Provider

Other / Unknown

### Execution Provider Library Version

_No response_