[XPU] Enhance XPUGeneratorImpl functionality to support XPUGraph (#163332)

As this [XPUGraph RFC](https://github.com/pytorch/pytorch/issues/162143) descripted. This PR enhances `XPUGeneratorImpl` to support XPUGraph.
In this PR, we add `XPUGerneratorState` and `PhiloxXpuState`. Which makes XPUGraph update philox state during graph capture and replay correctly

XPUGraph PR submission plan:

- [ ] 1, Enhance XPUGenerator functionality. Add XPUGeneratorState and philoxState
- [ ] 2, implemenet XPUGraph capture_begin/capture_end/instantiate functionality
- [ ] 3, implemenet XPUGraph replay/debug_dump/reset functionality
- [ ] 4, python APIs: is_current_stream_capturing/graph_pool_handle/graph
- [ ] 5, python APIs: make_graphed_callables

Pull Request resolved: https://github.com/pytorch/pytorch/pull/163332
Approved by: https://github.com/gujinghui, https://github.com/EikanWang, https://github.com/albanD

c10/xpu/XPUGraphsC10Utils.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <c10/xpu/XPUStream.h>
+#include <iostream>
+
+// XPU Graphs utils used by c10 and aten.
+using namespace sycl::ext::oneapi::experimental;
+namespace c10::xpu {
+
+static_assert(
+    int8_t(queue_state::executing) == 0,
+    "unexpected int(queue_state::executing) value");
+static_assert(
+    int8_t(queue_state::recording) == 1,
+    "unexpected int(queue_state::recording) value");
+
+enum class CaptureStatus : int8_t {
+  Executing = int8_t(queue_state::executing),
+  Recording = int8_t(queue_state::recording)
+};
+
+inline std::ostream& operator<<(std::ostream& os, CaptureStatus status) {
+  switch (status) {
+    case CaptureStatus::Executing:
+      os << "Executing";
+      break;
+    case CaptureStatus::Recording:
+      os << "Recording";
+      break;
+    default:
+      TORCH_INTERNAL_ASSERT(
+          false, "Unknown XPU graph CaptureStatus", int(status));
+  }
+  return os;
+}
+
+inline CaptureStatus currentStreamCaptureStatusMayInitCtx() {
+  auto state = c10::xpu::getCurrentXPUStream().queue().ext_oneapi_get_state();
+  return CaptureStatus(state);
+}
+
+} // namespace c10::xpu