[rocm7.1_internal_testing] Define uint32 t when ROCM_VERSION >= 70000 (#2527)

Fixes SWDEV-543698
(https://ontrack-internal.amd.com/browse/SWDEV-543698)

Cherry-picked from #2502

This PR fixes the errors like below:
```
[rank3]: RuntimeError: The following operation failed in the TorchScript interpreter.
[rank3]: Traceback of TorchScript (most recent call last):
[rank3]: RuntimeError: /tmp/comgr-28f951/input/CompileSourceACC062:67:7: error: unknown type name 'uint32_t'; did you mean '__hip_internal::uint32_t'?
[rank3]:    67 |       uint32_t int32;
[rank3]:       |       ^~~~~~~~
[rank3]:       |       __hip_internal::uint32_t
```
Earlier uint32_t was defined in HIP headers in std namespace. Now it is
moved to __hip_internal namespace in hip headers. This change is made in
ROCm 7.0.

Author: rraminen

torch/csrc/jit/codegen/fuser/cuda/resource_strings.h

@@ -260,13 +260,82 @@ typedef __half half;
 )";
 #endif
 
-#if defined(USE_ROCM)
+#if defined(USE_ROCM) && ROCM_VERSION < 70000
+constexpr auto bfloat16_support_literal =
+    R"(
+#ifndef __align__
+#define __align__(x) __attribute__((aligned(x)))
+#endif
+
+typedef struct __align__(2) {
+  unsigned short x;
+}
+__nv_bfloat16_raw;
+
+#if defined(__cplusplus)
+struct __align__(2) __nv_bfloat16 {
+  __host__ __device__ __nv_bfloat16() {}
+
+  __host__ __device__ __nv_bfloat16& operator=(const __nv_bfloat16_raw& hr) {
+    __x = hr.x;
+    return *this;
+  }
+
+  unsigned short __x;
+};
+
+__device__ unsigned short __internal_float2bfloat16(
+    const float f,
+    unsigned int& sign,
+    unsigned int& remainder) {
+  unsigned int x;
+
+  x = __float_as_uint(f);
+
+  if ((x & 0x7fffffffU) > 0x7f800000U) {
+    sign = 0U;
+    remainder = 0U;
+    return static_cast<unsigned short>(0x7fffU);
+  }
+  sign = x >> 31;
+  remainder = x << 16;
+  return static_cast<unsigned short>(x >> 16);
+}
+
+/* Definitions of intrinsics */
+__device__ __nv_bfloat16 __float2bfloat16(const float a) {
+  __nv_bfloat16 val;
+  __nv_bfloat16_raw r;
+  unsigned int sign;
+  unsigned int remainder;
+  r.x = __internal_float2bfloat16(a, sign, remainder);
+  if ((remainder > 0x80000000U) ||
+      ((remainder == 0x80000000U) && ((r.x & 0x1U) != 0U))) {
+    r.x++;
+  }
+  val = r;
+  return val;
+}
+
+__device__ float __bfloat162float(const __nv_bfloat16 a) {
+  union
+  {
+      uint32_t int32;
+      float    fp32;
+  } u = {uint32_t(a.__x) << 16};
+  return u.fp32;
+}
+#endif /* defined(__cplusplus) */
+)";
+#elif defined(USE_ROCM) && ROCM_VERSION >= 70000
 constexpr auto bfloat16_support_literal =
     R"(
 #ifndef __align__
 #define __align__(x) __attribute__((aligned(x)))
 #endif
 
+typedef unsigned int uint32_t;
+
 typedef struct __align__(2) {
   unsigned short x;
 }