[SYCL][E2E] Re-enable test-e2e/SubGroup/load_store.cpp (#15010)

Fixes #15006

This test passes against all adapters both on my own machine and Github
CI and should now be re-enabled.

Author: martygrant

sycl/test-e2e/SubGroup/load_store.cpp

@@ -1,8 +1,6 @@
 // RUN: %{build} -Wno-error=deprecated-declarations -fsycl-device-code-split=per_kernel -o %t.out
 // RUN: %{run} %t.out
-//
-// TODO: Flaky reenable, see https://github.com/intel/llvm/issues/14765
-// UNSUPPORTED: windows, linux
+
 //
 //==----------- load_store.cpp - SYCL sub_group load/store test ------------==//
 //