ci: pagination e2e

[codemonkey800]

538

Adds pagination E2E tests for the browse datasets and single dataset pages. This primarily checks that the max page count is displayed correctly and that selecting a page will load the correct items based on the backend.

[kne42]

also we're missing tests on the arrows for the pagination e.g. if they disappear when at the first / last pages, if clicking on them gives us the correct page, etc.

[codemonkey800]

also we're missing tests on the arrows for the pagination e.g. if they disappear when at the first / last pages, if clicking on them gives us the correct page, etc.

I intentionally avoided testing those because :

1. Since it's an SDS component, I'm sure it's thoroughly testing that the arrows work as expected
2. The test cases capture the main thing we want to test: does selecting a specific page load the correct items. That can happen through selection, clicking on the arrows, or selecting using the page dropdown.

let's sync more on it our 1:1 though, it shouldn't be too hard to add these cases too

[codemonkey800]

sync'd with Kira and there's still value in having the E2E for the arrows, so going to add the following tests:

• check that pagination is invisible when maxPages === 1
• check that the next arrow loads the next page with correct items
• check that the previous arrow loads the previous page with correct items
• check that the next arrow is disabled when on the last page
• check that the previous arrow is disabled when on the first page
• check that the page dropdown selector works