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.

issue 中没有提到文件或测试。首先跟踪这里描述的 Angular CDK 拖放列表行为和 cdkDropListDropped 回调；完成的标准是，列表间拖放会直观地替换目标项，而不会移动相邻项。

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