Drag Drop: disable shifting on target droplist and enable replacing

#### Feature Description

Looking at multiple droplists enable to drag one item from droplist 1 to droplist 2. After dropping item 1 on item 2, switch position instead of shifting all items to the next position.

#### Use Case

What we now did is just added this to every droplist:
` (cdkDropListDropped)="drop($event, indexRow)"`

In this 'drop' function we made 2 situations, either `transferArrayItem()` or `moveItemInArray()`

This just moves the items inside the droplist or moves them from one droplist to another. This all works. The downside is though, while you are dragging an item from droplist 1 to droplist 2, you see all the items in droplist 2 shifting a position to the right (When horizontal orientated). While our code says in the background to just switch places.
After the code is done, the shifted items all go back to their original places.

In der Issue wird keine Datei und kein Test genannt. Beginne damit, das hier beschriebene Verhalten von Angular CDK-Drag-and-drop-Listen und den cdkDropListDropped-Callback nachzuverfolgen; fertig ist es, wenn Drops zwischen Listen das Zielelement sichtbar ersetzen, ohne benachbarte Elemente zu verschieben.

Vom Indexierungsmodell aus dem Issue-Text verfasst.