`tests/debuginfo/numeric-types.rs` test coverage became 64-bit only

[jieyouxu]

Marking numeric-types.rs as 64-bit only for now to unblock the tree (in #133115), follow-up investigations should try to see if that can be made to work with i686-msvc (64-bit isize vs 32-bit isize and thus different underlying int type display).

Originally posted by @jieyouxu in #133107