scudo: Remove positional template arguments for secondary cache. NFCI.

Make these arguments named constants in the Config class instead
of being positional arguments to MapAllocatorCache. This makes the
configuration easier to follow.

Eventually we should follow suit with the other classes but this is
a start.

Differential Revision: https://reviews.llvm.org/D93251

GitOrigin-RevId: f21f3339ba315f181e195f368f2a7ecff1cee597
Change-Id: I905ea8ac74e55769e5d4060180d05d2778861778
5 files changed