[TensorRT EP] Address compiler warnings on Windows (#20134)
Previous [PR
](https://github.com/microsoft/onnxruntime/pull/19663)changes msvc
compiler warning level from set_msvc_c_cpp_compiler_warning_level(3) to
set_msvc_c_cpp_compiler_warning_level(4) when using CUDA EP (it also
applies to TRT EP).
Some warnings still need to be addressed in TRT EP code.
