Store extra state data on state rather than actions

[sethrj]

There are a growing number of Actions that store data as part of the class rather than the state, as implemented by the StreamStore in #722:

• SimpleCalo
• StepDiagnostic
• ActionDiagnostic
• OpticalGenStorage

These should all be stored dynamically as part of the CoreState rather than in each of the classes

Requirements:

• Initialization happens at begin_run (construct?) via BeginRunActionInterface?
• Has a "finalize" method to deallocate
• std::any-like behavior but specific to a core
• DataId for storage/retrieval from CoreState

Eventually: have "initializing" state for each track so that per-track data can be constructed/reset/etc.