PC sampling: online partial PC sampling decoding (#1004)

* PC sampling: online partial PC sampling decoding

PC sampling service decodes a PC sample partially
by replacing the PC with an id of the loaded code object instance
containing PC and the offset of the PC within that code object instance.

* PC sampling: marker records removed

* PC sampling parser: minor doc update in mock

* PC sampling: introducing rocprofiler_pc_t

* NULL value of the code object id introduced.

* Clarifying documenation related to PC offset.

* PC offset documentation improvement

* PC sampling parser benchmark: Reducing the number of samples to recreate half of performance.

source/lib/rocprofiler-sdk/pc_sampling/parser/tests/benchmark_test.cpp

@@ -35,7 +35,7 @@ static bool
 Benchmark(bool bWarmup)
 {
     constexpr size_t SAMPLE_PER_DISPATCH = 8192;
-    constexpr size_t DISP_PER_QUEUE      = 12;
+    constexpr size_t DISP_PER_QUEUE      = 8;
     constexpr size_t NUM_QUEUES          = MockDoorBell::num_unique_bells;
 
     std::shared_ptr<MockRuntimeBuffer> buffer = std::make_shared<MockRuntimeBuffer>();