[Grid] Reorderable column without a defined field renders an arrow cursor for its header instead of a pointer

[zstoyanova9]

Description

When a Grid column is configured to be reorderable and a field is not defined for this column, its header cursor appears as an arrow instead of a pointer. However, the column is still interactive and can be reordered.

The behavior occurs since the !k-cursor-default class is applied to the header of this column.

Steps To Reproduce

1. Enable the reorderable functionality of the Grid.
2. Define a column without specifying a field.
3. Hover over the header of this column.

StackBlitz example - https://stackblitz.com/edit/angular-xrhat3-cnbmjm

Actual Behavior

The header cursor of the reorderable column without a field is rendered as an arrow.

Expected Behavior

The header cursor of this column should be rendered as a pointer since the column is reorderable and thus it is interactive.