ASM_MASM: Populate MSVC runtime library abstraction table
In !3211 (merged) we overlooked populating the runtime library selection flags for the Microsoft assembler. It does not actually have any such flags, but since its compiler id is MSVC
our generators expect the table to be populated. Use empty values.
Without this fix, enabling the ASM_MASM
language with policy CMP0091
set to NEW
causes an error due to the missing table entries.
Fixes: #20236 (closed), #19453 (closed)
Backport: release