MdeModulePkg/MemoryStatusCode: Expose the DXE memory status code table.

MdeModulePkg/MemoryStatusCode: Expose the DXE memory status code table.

Let data of DXE memory status code can be used by other modules.
1. Save the address of DXE memory status code table to DxeConfigurationTable.
2. Save the address of SMM memory status code table to SmmConfigurationTable.
3. Move RUNTIME_MEMORY_STATUSCODE_HEADER to its public header file.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Cinnamon Shia <cinnamon.shia@hpe.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>