scudo: Remove some boilerplate from the combined allocator tests. NFCI.

Differential Revision: https://reviews.llvm.org/D84454

GitOrigin-RevId: 9b2164063f770ef8085669b570dfd636cfa342b7
Change-Id: Ib1da7a18e38548558412a67b3a08e78bba08f1b8
Merged-In: Ib1da7a18e38548558412a67b3a08e78bba08f1b8
(cherry picked from commit 413a92174fe9e3bb094e9d0ea71a437a56f6a264)
2 files changed