Pagination accessibility

[marlo-longley]

Close this issue either because:

1. this was addressed in BL
2. this won't be addressed in BL and we had to fix it in EW for this workcycle

Here's some guidance on accessibility:

• https://www.a11ymatters.com/pattern/pagination/

• https://designsystem.digital.gov/components/pagination/#accessibility-guidance (from a design system)

• https://a11y-style-guide.com/style-guide/section-navigation.html#kssref-navigation-pagination

Note for the first example, you'll see pagination wrapped in:

<nav role="navigation" aria-label="Pagination Navigation">

The <nav> element with a role attribute of "navigation" is incorrect. That's a duplication of the same information. It's best practice to use <nav> element with a distinct aria-label to distinguish it from other types of navigation on the page.

Originally posted by @dbranchini in #1170