MdeModulePkg: PiSmmIpl: Update MessageLength calculation for MmCommunicate

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3398
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3430

This change added support of installing `EFI_MM_COMMUNICATION3_PROTOCOL`.

MmCommunicate v3 routine that calculates message length is also updated
to remove ambiguity in contrast to v1 routine.

Signed-off-by: Kun Qin <kuqin12@gmail.com>