Fix rocprofiler plugin

- Replace non-working fields with working ones
    - remove CU_OCCUPANCY completely as it isn't well supported
- Fix rocprofiler initialization with shared_ptr and rdc_module_init
- Replace env var ROCPROFILER_METRICS_PATH with ROCP_METRICS
    - ROCPROFILER_METRICS_PATH is only relevant for rocprofv2
    - ROCP_METRICS is only relevant for rocprofv1 (which we are using)

Change-Id: I21e6fa3f0e1694c38f44ca0e5659d672559f7380
Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>

example/rocprofiler_example.cc

@@ -128,7 +128,6 @@ int run() {
   field_ids.push_back(RDC_FI_GPU_MEMORY_USAGE);
   field_ids.push_back(RDC_FI_POWER_USAGE);
   // profiler metrics
-  field_ids.push_back(RDC_FI_PROF_CU_OCCUPANCY);
   field_ids.push_back(RDC_FI_PROF_MEAN_OCCUPANCY_PER_CU);
   field_ids.push_back(RDC_FI_PROF_MEAN_OCCUPANCY_PER_ACTIVE_CU);
   field_ids.push_back(RDC_FI_PROF_ACTIVE_CYCLES);