More (x2) Trig Cost updates following T11

This is the second round of trig cost updates following M11.

Note: This build on top of !34568 (merged) and will show many more changes until that MR is merged.

New to this MR are

• MonitorThreadOccupancy and CounterThread classes - perform per-thread monitoring on events collected online in the master-slot (i.e. with data saved from all slots / all threads)
• MonitorAlgorithmClass - perform per-alg monitoring, but divided based on each alg's instance's class type name.