Counter's PT boost and gain ability must use layer's timestamps like other effects?

from #15695

No real bugs exists, for info only

xmage uses global `ApplyStatusEffect` to apply:
- PT boost from counters;
- gain ability from counters like manace counter;

It's called directly in each game cycle on related layers:
- `Layer.AbilityAddingRemovingEffects_6`
- `Layer.PTChangingEffects_7`

But there are potential problem with effects dependencies and timestamps -- all other effects apply by layers and timestamps thanks to paper rules and `getLayeredEffects`, but not `ApplyStatusEffect`

As example: if some potential counter's `AbilityAddingRemovingEffects_6` effect lookup for some gained ability (e.g. depends on it) then it will be buggy cause it applies first all the time instead effect's timestamp and dependency.

One of the possible solution (if such bugs really exists): inject per permanent ApplyStatusEffect in getLayeredEffects.

P.S. related issue with "layers 7c and 7d have been merged": #11692

Start by reading ApplyStatusEffect, Layer.AbilityAddingRemovingEffects_6, Layer.PTChangingEffects_7, and getLayeredEffects. Compare how counter effects are applied with the timestamp and dependency handling used by other layered effects. Done requires confirming whether the described ordering problem exists and agreeing on an implementation approach.

Written by the indexing model from the issue text.