Remove unnecessary attributes of User struct (#17745)

* Remove unnecessary functions of User struct

* Move more database methods out of user struct

* Move more database methods out of user struct

* Fix template failure

* Fix bug

* Remove finished FIXME

* remove unnecessary code

templates/user/dashboard/repolist.tmpl

@@ -14,7 +14,7 @@
 	{{end}}
 	]"
 	:is-organization="false"
-	:organizations-total-count="{{.ContextUser.GetOrganizationCount}}"
+	:organizations-total-count="{{.UserOrgsCount}}"
 	:can-create-organization="{{.SignedUser.CanCreateOrganization}}"
 	{{end}}
 	inline-template

templates/user/profile.tmpl

@@ -65,7 +65,7 @@
 							{{end}}
 							{{if and .IsSigned (ne .SignedUserName .Owner.Name)}}
 							<li class="follow">
-								{{if .SignedUser.IsFollowing .Owner.ID}}
+								{{if $.IsFollowing}}
 									<form method="post" action="{{.Link}}/action/unfollow?redirect_to={{$.Link}}">
 										{{$.CsrfTokenHtml}}
 										<button type="submit" class="ui basic red button">{{svg "octicon-person"}} {{.i18n.Tr "user.unfollow"}}</button>