review link/button text and expand or add labels where necessary (WCAG 2.4.4, 3.3.2)

[cfm]

Description

Accessibility Lab recommendation:

The purpose of each link can be determined from the link text alone or from the link text together with its programmatically determined link context, except where the purpose of the link would be ambiguous to users in general.

User Research Evidence

WCAG 2.4.4 per #5972.

Implementation

Suggested as part of accessibility review of #6315:

• When a user navigates using a screen-reader, do existing text/labels give sufficient context for where links will take them and what button will do ("Delete user journalist")? or must they infer from surrounding elements ("Delete user")?
• "Read more" links should have aria-labels that expand to "Read more about [...]"