Provide k-checkbox-label when the label is placed on the left side

[mbechev]

Describe the bug
The existing k-checkbox-label and k-radiobutton-label classes add space between the label and the input which makes them appear more user-friendly.

<kendo-checkbox #checkbox1 ></kendo-checkbox>
<kendo-label class="k-checkbox-label" [for]="checkbox1" text="Checkbox Component"></kendo-label>

However, there is no available class if the label is placed on the left side of the input:

<kendo-label [for]="checkbox3" text="Checkbox Component"></kendo-label>
<kendo-checkbox #checkbox3 [checkedState]="true"></kendo-checkbox>

The workaround is to use an inline style, which has been used for the k-checkbox-label:

<kendo-label 
    [for]="checkbox3" 
    text="Checkbox Component" 
    style="display: inline;margin-inline-end: 4px;">
</kendo-label>

https://stackblitz.com/edit/angular-q9mv5x?file=src%2Fapp%2Fapp.component.ts,src%2Fapp%2Fapp.module.ts