[Accessibility] [Toggle] Form control with "switch" role has no associated label

[eduardmarcinco]

Detailed description

Describe in detail the issue you're having.

Accessibility checker complains about a violation in toggle component.

Is this a feature request (new component, new icon), a bug, or a general issue?

Accessibility violation.

Is this issue related to a specific component?

Toggle.

What version of the Carbon Design System are you using?

"carbon-components-angular": "5.14.10"

Steps to reproduce the issue

Violation can be seen in storybook.

https://angular.carbondesignsystem.com/iframe.html?args=&id=components-toggle--basic&viewMode=story