Activity Log: move intro guided tour to the right of the nav item

[joanrho]

Related to #27214

Let's move the guided tour over from below the sidebar nav item to the right of it instead. This will help make it more visible/prominent on the screen.

Before/after:

[roccotripaldi]

Let's also update copy:

"Published Posts, Page Updates, Comments, and more" for both banners.

And make the "Learn more" a secondary button instead of a link.

Props @shaunandrews for the suggestions

[github-actions]

This issue is stale because it has been 180 days with no activity. You can keep the issue open by adding a comment. If you do, please provide additional context and explain why you’d like it to remain open. You can also close the issue yourself — if you do, please add a brief explanation and apply one of relevant issue close labels.

[github-actions]

This issue is stale because it has been 180 days with no activity. You can keep the issue open by adding a comment. If you do, please provide additional context and explain why you’d like it to remain open. You can also close the issue yourself — if you do, please add a brief explanation and apply one of relevant issue close labels.