[SYCL][ESIMD][E2E] Fix unified memory block_store local accessor test (intel#12229)

We should be using `Size` like the rest of the tests.

Signed-off-by: Sarnie, Nick <nick.sarnie@intel.com>

Author: sarnex

sycl/test-e2e/ESIMD/unified_memory_api/Inputs/block_store.hpp

@@ -332,7 +332,7 @@ bool testLocalAccSLM(queue Q, uint32_t Groups,
 
   constexpr size_t Alignment = getAlignment<T, N, UseMask>(StoreProperties);
 
-  shared_vector Out(GroupSize, shared_allocator{Q});
+  shared_vector Out(Size, shared_allocator{Q});
   T OutVal = esimd_test::getRandomValue<T>();
   for (int i = 0; i < Size; i++)
     Out[i] = OutVal;