[SYCL][Graph] Fix E2E Filecheck regex

CI is showing fails like https://github.com/intel/llvm/actions/runs/11969728548/job/33373742453?pr=15843
where the test is expecting output like:

```
.phKernelAlternatives = {0x12ed110, 0x1501ac0, 0x1502b60}
```

but the `SYCL_UR_TRACE` output is formed like:

```
.phKernelAlternatives = 0x23b4070 {0x25529d0, 0x2555000, 0x25560a0}
```

Update the Filecheck regex

Author: EwanC

sycl/test-e2e/Graph/Update/dyn_cgf_different_arg_nums.cpp

@@ -69,7 +69,7 @@ int main() {
   // CHECK: <--- urCommandBufferAppendKernelLaunchExp
   // CHECK-SAME: .hKernel = [[KERNEL_HANDLE1]]
   // CHECK-SAME: .numKernelAlternatives = 3
-  // CHECK-SAME: .phKernelAlternatives = {[[KERNEL_HANDLE2:[0-9a-fA-Fx]+]], [[KERNEL_HANDLE3:[0-9a-fA-Fx]+]], [[KERNEL_HANDLE4:[0-9a-fA-Fx]+]]}
+  // CHECK-SAME: .phKernelAlternatives = {{[0-9a-fA-Fx]* ?}}{[[KERNEL_HANDLE2:[0-9a-fA-Fx]+]], [[KERNEL_HANDLE3:[0-9a-fA-Fx]+]], [[KERNEL_HANDLE4:[0-9a-fA-Fx]+]]}
   auto DynamicCG =
       exp_ext::dynamic_command_group(Graph, {CGFA, CGFB, CGFC, CGFD});
   auto DynamicCGNode = Graph.add(DynamicCG);