VS: Generate IntDir property for INTERFACE libraries

This is the solution proposed by @amznestebanpapp in #23043 (closed).

Since there was no progress in #23043 (closed) in some time, and I ran into a similar issue, I decided to create the MR myself. Just changing the condition for the early return seems to be enough, since all other conditionals in the function use guards that work even if ttype is cmStateEnums::INTERFACE_LIBRARY.

Fixes: #23043 (closed)