Create e2e (end-to-end) tests for Community List page

[tdonohue]

Describe the bug

Enhance the existing e2e tests in community-list.cy.ts to include testing of features on the community list page (e.g. https://demo.dspace.org/community-list). These features may include:

• Verify top level communities display with item count next to each
• Verify expanding community hierarchy works. Verify you can also expand sub-collections/communities
• If more than 20 top-level communities, verify "Show more" displays at the bottom

Expected behavior

The community-list page actions should be more fully tested

Related work

Subticket of #3978