Add IMove.MoveOntoTarget interface

[PunkPun]

Closes #19163
Split from #20168
Addresses some concerns from #20187

IMove.MoveOntoTarget

• This method is needed to properly unify aircraft and ground unit docking.
• Because Aircraft have to integrate turning into their Land code I had to integrate it into Mobile as well. I've done it with the new MoveOntoAndTurn activity.

MoveOnto Activity

• I've changed the way ground units wait for dock. Now the dock position is dynamically tracked and proper offsets are applied. This is basically the new way of of tracking, we didn't have any method of tracking a position with an offset before.
• It works by giving the pathfinder the exact position of the dock, but when we reach 1 cell distance to the target and the target is blocked, we return no path thus forcing the pathfinder to wait. After conditions have changed we start pathing again. (Instead of the current solution of giving pathfinder all positions around the dock)

In the first commit I haven't done any functional changes to MoveWithinRange nor MoveAdjacentTo. I've just moved the code around to allow better overwriting.

The testcase is there just to show off that you can now dock to moving docks. It's still not properly supported as in docked units don't attach and there are probably some bugs. But it's a start.

[PunkPun]

dropped the testcase

[Mailaender]

Changelog