OpenCL

Good news:

Bad news:

Build failure in GPUdEdx::fillCluster, due to recursion? Doesn't affect clusterizer.
Still some differences in found & cluster count (even with deterministic mode)

Highly Ionizing Particles

- Noisy pad filter already scans TPC pads along time axis, but neighboring pads processed in parallel

- Need seperate step that filters HIP tails beforehand