Rule: label changes (part 1)

[jeeyyy]

The following test cases should yield desired result

1. Fail: aria-label with empty text string

<div aria-label=" " role="combobox">England</div>

2. Fail: Label does not exist.

<div aria-labelledby="non-existing" role="combobox">England</div>

3. Fail: Implicit label not supported on div elements.

<label>
  first name
  <div role="textbox" data-rule-target></div>
</label>

4. Fail: Explicit label not supported on div elements.

<label for="lastname">first name</label>
<div role="textbox" id="lastname" data-rule-target></div>

[jeeyyy]

The below PR's tackled the above issue

• feat(rule): New aria-toggle-field-label rule #1450
• feat(rule): New aria-input-field-label rule #1610