[EuiPagination] Fixed wrong page count with compressed

[crux153]

Summary

Fix for #3826.

if (compressed) {
    const firstPageButtonCompressed = (
      <PaginationButton pageIndex={activePage} inList={false} />
    );
    const lastPageButtonCompressed = (
      <PaginationButton pageIndex={pageCount} inList={false} />
    );
}

EuiPagination was passing one based pageCount prop to PaginationButton's pageIndex prop directly, which is zero based, which caused wrong page count when used with compressed.

Before

After

[kibanamachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[thompsongl]

Thanks for this @crux153

Can you please also add a changelog entry under the Bugfixes section?

[crux153]

@thompsongl Done :)

[thompsongl]

jenkins test this

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_3827/

[thompsongl]

jenkins test this

[thompsongl]

Confirmed with the docs deployment that the correct number of pages is shown.

Will merge on green CI

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_3827/