Only use prev and next buttons for pagination on user dashboard (#33981)

The pagination on the user dashboard sounds unnecessary, this will
change it to a prev/next buttons. For instances with around `10 million`
records in the action table, this option affects how the user dashboard
is loaded on first visit.

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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>

modules/paginator/paginator_test.go

@@ -76,9 +76,7 @@ func TestPaginator(t *testing.T) {
 	t.Run("Only current page", func(t *testing.T) {
 		p := New(0, 10, 1, 1)
 		pages := p.Pages()
-		assert.Len(t, pages, 1)
-		assert.Equal(t, 1, pages[0].Num())
-		assert.True(t, pages[0].IsCurrent())
+		assert.Empty(t, pages) // no "total", so no pages
 
 		p = New(1, 10, 1, 1)
 		pages = p.Pages()