[ESIMD] Enable the test imulh_umulh.cpp (#1594)

The test was disabled due to false-alarm. The cases/PRs reporting
this test as 'unrelated fail' used _old_ compiler with _new_ test.

All such PRs had CI runs with the test failed at compilation.

Even though both the PR and LIT tests were merged at same hour,
the compiled used by CI was still old, but the test was new.
PR: intel/llvm#8176
PR-LIT: #1566

Signed-off-by: Vyacheslav N Klochkov <[email protected]>

Author: v-klochkov

SYCL/ESIMD/imulh_umulh.cpp

@@ -10,9 +10,6 @@
 // RUN: %clangxx -fsycl %s -o %t.out
 // RUN: %GPU_RUN_PLACEHOLDER %t.out
 
-// TODO: the test gives irregular fails in CI (flaky), disabled until resolved.
-// UNSUPPORTED: gpu
-
 // The test verifies ESIMD API that multiplies 2 32-bit integer scalars/vectors
 // resulting into 64-bit result and returning the result as 2 parts:
 // lower 32-bits in the input modified operand and upper 32-bits as return