Use small_vector for API iterate_args (#597)

* Use small_vector for API iterate_args

- replace dim3 value arguments with rocprofiler_dim3_t
  - dim3 has a non-trivial destructor
- common::mpl::unqualified_type
- common::stringified_argument_array_t<N> alias
- assert_public_data_type_properties()
- common::container::small_vector<T>::at function
- stringize returns small_vector<stringified_argument>
  - stack allocated vector
- remove has_pc_sampling condition (HSA, HIP)
  - this will be handled in queue interception

* Misc tweaks

source/include/rocprofiler-sdk/marker/api_args.h

@@ -40,14 +40,14 @@ typedef struct rocprofiler_marker_api_no_args
     char empty;
 } rocprofiler_marker_api_no_args;
 
-typedef union rocprofiler_marker_api_retval_u
+typedef union rocprofiler_marker_api_retval_t
 {
     int32_t          int32_t_retval;
     int64_t          int64_t_retval;
     roctx_range_id_t roctx_range_id_t_retval;
 } rocprofiler_marker_api_retval_t;
 
-typedef union rocprofiler_marker_api_args_u
+typedef union rocprofiler_marker_api_args_t
 {
     struct
     {