Capture critical PMCs for perf and render flamegraph using these

Currently we are only capturing default perf for perf based profiling, it doesn't capture any other types of events. This issue is created to request we that we allow ability for dynamic profiler to invoke perf with specific events and build a flamegraph for these to aid in solving and tracing performance issues.

To start with we want:
- cache-misses
- stalled-frontend / backend