Steps to reproduce (assumes ChromeVox or similar)

1. Open https://elastic.github.io/eui/#/forms/form-layouts in a new tab.
2. Tab to the first text field, labeled "text field"

Actual Result

"Text field. Edit text"

Expected Result

"Text field. I am some friendly help text. Edit text"

Category: #750: Elastic UI Form Layout Accessibility
Relevant WCAG Criteria: 1.3.1 Info and Relationships