move compiler_stub.c to intrinsiclib

[jyao1]

We need move https://github.com/DMTF/libspdm/blob/main/unit_test/test_size/test_size_of_spdm_requester/compiler_stub.c and https://github.com/DMTF/libspdm/blob/main/unit_test/test_size/test_size_of_spdm_responder/compiler_stub.c to https://github.com/DMTF/libspdm/tree/main/unit_test/test_size/intrinsiclib.

Also memcpy should be merged to intrinsiclib/memory_intrinsics.c.

The original code seems work-around.

This is for test_size application. Need test X64 (VS2019, GCC, CLANG), AARCH64 (ARM_DS2022, ARM_GNU, ARM_GCC)