[SWDEV-509876] Remove buffer requirement from device counting service (#132)

* [SWDEV-509876] Remove buffer requirement from device counting service

No longer require a buffer to be given when setting up device counting
service. This is to reduce performance overhead in cases where immediate
return of counting samples is being used (synchronous mode).

* Missed file

* Update source/include/rocprofiler-sdk/device_counting_service.h

Co-authored-by: Madsen, Jonathan <Jonathan.Madsen@amd.com>

* Update source/lib/rocprofiler-sdk/counters/controller.cpp

Co-authored-by: Madsen, Jonathan <Jonathan.Madsen@amd.com>

* Update source/lib/rocprofiler-sdk/counters/device_counting.cpp

Co-authored-by: Madsen, Jonathan <Jonathan.Madsen@amd.com>

* Fixes for build

---------

Co-authored-by: Benjamin Welton <ben@amd.com>
Co-authored-by: Madsen, Jonathan <Jonathan.Madsen@amd.com>
Co-authored-by: Benjamin Welton <bewelton@amd.com>

source/include/rocprofiler-sdk/device_counting_service.h

@@ -76,7 +76,9 @@ typedef void (*rocprofiler_device_counting_service_callback_t)(
  * @param [in] context_id context id
  * @param [in] buffer_id id of the buffer to use for the counting service. When
  * rocprofiler_sample_device_counting_service is called, counter data will be written
- * to this buffer.
+ * to this buffer. If the input buffer id is null (i.e. `rocprofiler_buffer_id_t{.handle = 0}`), the
+ * counter data will not be written to a buffer and will only be returned in the output_records of
+ * rocprofiler_sample_device_counting_service
  * @param [in] agent_id agent to configure profiling on.
  * @param [in] cb Callback called when the context is started for the tool to specify what
  * counters to collect (rocprofiler_profile_config_id_t).