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>

templates/user/dashboard/dashboard.tmpl

@@ -5,7 +5,7 @@
 		<div class="flex-container-main">
 			{{template "base/alert" .}}
 			{{template "user/heatmap" .}}
-			{{if .Feeds}}
+			{{if .Page.Paginater.TotalPages}}
 				{{template "user/dashboard/feeds" .}}
 			{{else}}
 				{{template "user/dashboard/guide" .}}