Account for NUMA partitions in RunTimeSizeClassesTest.ExpandedSizeClasses
Account for NUMA partitions in RunTimeSizeClassesTest.ExpandedSizeClasses

It's no longer sufficient to expect that size classes numbered
kSizeClassesCount or higher are expanded size classes, since we have duplicate
size classes for NUMA partitions. Account for that in the
RunTimeSizeClassesTest.ExpandedSizeClasses test.

PiperOrigin-RevId: 381047960
Change-Id: Ibc89d3508b9a2a3c13ef72f48a0e6d3c1e8efbd1

google/tcmalloc,google/tcmalloc,google/tcmalloc