Fix Displayed Total Items in Environment Dashboard

What does this MR do?

Infinite scrolling was added to the shared Project Selector component in !17842 (merged), but the environment dashboard was not updated to utilize the new features.

This ensures that infinite scrolling is enabled and working 👍

Issue: #36771 (closed)

Screenshots

Note the text Showing X of Y items

before	after

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers