ATOM-13791 Editor: ImGui profiling tools doesn't work correctly due to disabled RenderPipelines

- Added pause/resume button to ImGui Profiler to pause/resume profiling
- Added showing pass execution timeline
- Change TimestampResult to include both begin tick and duration tick. Update some function names of TimestampResult.
- Update some functions names in Pass.
- Stop showing accumulated time for ParentPass.
- Fixed a crash issue with ImGuiManager which doesn't have default font.

Gems/Atom/Feature/Common/Code/Source/ProfilingCaptureSystemComponent.cpp

@@ -186,7 +186,7 @@ namespace AZ
         {
             for (const RPI::Pass* pass : passes)
             {
-                m_timestampEntries.push_back({ pass->GetName(), pass->GetTimestampResult().GetTimestampInNanoseconds() });
+                m_timestampEntries.push_back({pass->GetName(), pass->GetLatestTimestampResult().GetDurationInNanoseconds()});
             }
         }
 
@@ -223,7 +223,7 @@ namespace AZ
         {
             for (const RPI::Pass* pass : passes)
             {
-                m_pipelineStatisticsEntries.push_back({ pass->GetName(), pass->GetPipelineStatisticsResult() });
+                m_pipelineStatisticsEntries.push_back({pass->GetName(), pass->GetLatestPipelineStatisticsResult()});
             }
         }