Nuget build break fix

[guoyu-wang]

Description: Fix the nuget build break caused by change #4718

Motivation and Context

• The change Add a generic collection of session configurations to the SessionOptions #4718 added a new head file "session_options_config_keys.h" which is not copied by generate_nuspec_for_native_nuget.py since the name is not started with 'onnxruntime_', so the new header file is not included in the nuget native package which caused failure.
• The fix is to rename the "session_options_config_keys.h" to "onnxruntime_session_options_config_keys.h"

Pending Nuget GPU pipeline run, https://aiinfra.visualstudio.com/Lotus/_build/results?buildId=130821&view=results
Will not merge unless the pipeline pass on the branch