"Last" pager links inside a modal do not open in the modal

Problem/Motivation

#3122526: Pager links inside a modal do not open in the modal addressed the issue with pager links in modal generally, but it looks like the "Last" pager link was missed.

Steps to reproduce

Basically the same as #3122526: Pager links inside a modal do not open in the modal steps to reproduce, except specifically for the "Last" pager link

1. Create a custom route with a pager
2. Create a route with a link to open the route in step 1 in a modal
3. Open the modal, click the Last pager link
4. Expected to see that page in the modal, but page is reloaded with ajax params rendered.

Alternative is to try enabling the pager_test test module and going to the /pager-test/modal-pager in browser.

Proposed resolution

In PagerPreprocess::preprocessPager(), change this:
$items['last']['attributes'] = new Attribute();
to
$items['last']['attributes'] = new Attribute($link_attributes);

Remaining tasks

• Make the suggested change
• Extend test coverage to include the Last pager link

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet