[rocm7.1_internal_testing] Define datatypes when ROCM_VERSION >= 70000 (#2639)

Fixes SWDEV-543698

Cherry-picked from #2468
This PR fixes the errors like below:

[rank7]: RuntimeError: /tmp/comgr-c3c81b/input/CompileSourceejOPx6:34:8:
error: unknown type name 'uint64_t'; did you mean
'__hip_internal::uint64_t'? [rank7]: 34 | if(((uint64_t) t0.data) % (4 *
sizeof(half)) != 0) flag_vec4 = false;

Earlier uint64_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.

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

Author: rraminen

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

@@ -12,7 +12,7 @@ cases*/
 
 static constexpr auto bfloat16_type_string = "__nv_bfloat16";
 
-#if defined(USE_ROCM)
+#if defined(USE_ROCM) && ROCM_VERSION < 70000
 static auto type_declarations_template = at::jit::CodeTemplate(R"(
 ${HalfHeader}
 ${BFloat16Header}