fix skipped apply ipd ionization at end of FLYonPIC loop

[BrianMarre]

Adds the ability to configure wether the applyIPD-Ionization sub-stage skips finished super cells. This fixes a bug where IPD-ionization was never applied at the end of the FLYonPIC stage.

Also removes the limitation of applying IPD only to states not ionized without any IPD.

only the last 2 commits are part of this PR

• requires charge state dependent ipd #5529 to be merged first
• requires Ipd Unit Test #5530 to be merged first
• requires minor improvements in the FLYonPIC debug printing and dumping of ions. #5535 to be merged first
• needs to be rebased after required PRs are merged

[BrianMarre]

removing the limitiation of IPD to not naturally unbound states

[PrometheusPi]

looks formally okay - just a few questions

[PrometheusPi]

Just a question: What is the purpose of this skipSuperCell function?

[BrianMarre]

It is called at a predefined hook point in the ApplyIPDIonization-kernel and if it returns true, causes an early exit of the kernel, skipping the entire super cell in the kernel call, see here.
The ApplyIPDIonization-kernel is defined here and is an instance of the SpawnFromSourceSpecies-kernel framework, see here.

In general the SkipSuperCell-functor is a resource saving measure in the SpawnFromSourceSpecies-kernel framework, see here, which is a future replacement for the particle creation kernel, which among other things is more flexible and allows better code reuse.

The NeverSkipSuperCell implementation disables the skipping of super cells feature completely. This ensures that the IPD-ionization is applied to every super cell at the end of FLYonPIC step here, where every super cell is finished.