Fix `star` action in the `explore` subpages

What does this MR do?

In the explore subpages the Star button doesn't work, because the Javascript listener isn't added. This MR fixes the problem.

Pages affected:

• https://gitlab.com/explore
• https://gitlab.com/explore/projects/starred
• https://gitlab.com/explore/projects

What are the relevant issue numbers?

I was investigating #56874 (moved), but I am not sure this MR fixes that issue, because I was able to reproduce #56874 (moved) only on Gitlab.com.

So probably there isn't any associated issue

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer