Resolve "Project lists: further iteration & improvements"

What does this MR do?

This MR adds UI improvements to the Desktop view of the recently redesigned project list. In particular, the following changes are introduced:

Desktop 992px:

• remove star button
• MR, issues stats hidden
• info splits into columns

Desktop >1200px:

• remove star button
• MR, issues stats shown

Other changes to desktop viewports:

• title line height 20px
• no extra spacing between title and description
• avatar size 48px

Screenshots:

screen	before	after
992px
>1200px

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/56543

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

Closes #56543 (closed)