Make accessible name rules run exclusively on VirtualNode

[WilcoFiers]

This is part of our larger project to create a better abstraction layer in axe-core. For the 4.0, we want to have the following rules run exclusively on the virtualNode object (e.g. without anything in matches / evaluate / after, or any of the commons it uses touch the .actualNode property, or use the node parameter.

Rules

The following rules will be enabled to run exclusively on virtualNode:

• image-alt
• area-alt
• frame-title
• input-image-alt
• link-name
• object-alt
• button-name
• input-button-name
• role-img-alt
• svg-img-alt
• aria-toggle-field-name
• aria-input-field-name
• label

Checks

To enable this, the following checks will have to be converted:

• alt-space-value
• aria-label
• aria-labelledby
• focusable-no-name (maybe integrate this into role-none / role-presentation?)
• has-alt
• non-empty-alt
• non-empty-title
• has-visible-text
• role-none
• role-presentation
• button-has-visible-text
• non-empty-if-present
• non-empty-value
• svg-non-empty-title
• no-implicit-explicit-label
• implicit-label
• explicit-label
• help-same-as-label
• hidden-explicit-label

Match functions

Additionally, a few match functions will have to be converted as well:

• html-namespace-matches.js
• svg-namespace-matches.js
• aria-form-field-name-matches.js
• label-matches.js