[SYCL][E2E] Fix memory leaks in tests (#16375)

Author: yingcong-wu

sycl/test-e2e/AOT/early_aot.cpp

@@ -52,6 +52,7 @@ int main() {
     return 1;
   }
   std::cout << "PASSED\n";
+  free(result, q);
   return 0;
 }
 

sycl/test-e2e/Adapters/level_zero_interop_memcpy.cpp

@@ -28,4 +28,7 @@ int main() {
   int *hostMem = (int *)malloc_host(sizeof(int), Q2);
   int *devMem = malloc_device<int>(1, Q2);
   Q2.memcpy(hostMem, devMem, sizeof(int));
+
+  free(hostMem, Q2);
+  free(devMem, Q2);
 }

sycl/test-e2e/Matrix/joint_matrix_apply_two_matrices_impl.hpp

@@ -20,6 +20,7 @@ bool apply_verify(Tc *C, Tc *D, Tc *ref) {
 
   matrix_apply(M, N, refcopy, add5<Tc>);
   res &= matrix_compare(M, N, C, refcopy);
+  std::free(refcopy);
   return res;
 }