cleanup locale function usage (#27227) (#27240)

Backport #27227 by @denyskon

Throughout the Gitea codebase, you can meet some weird constructions to
make `locale.Tr` work in subtemplates.
Since we now have `ctx.Locale.Tr` which solves that problem, clean up
various templates which pass `locale` through `dict` or use some weird
constructions like `$.root.locale`

Going on, it would be great to replace every case of `$.locale.Tr` and
`.locale.Tr` with `ctx.Locale.Tr`, but that needs to be done with
patience.

Co-authored-by: Denys Konovalov <kontakt@denyskon.de>

templates/repo/actions/runs_list.tmpl

@@ -8,7 +8,7 @@
 	{{range .Runs}}
 		<div class="flex-item gt-ac">
 			<div class="flex-item-leading">
-				{{template "repo/actions/status" (dict "status" .Status.String "locale" $.locale)}}
+				{{template "repo/actions/status" (dict "status" .Status.String)}}
 			</div>
 			<div class="flex-item-main">
 				<a class="flex-item-title" title="{{.Title}}" href="{{if .Link}}{{.Link}}{{else}}{{$.Link}}/{{.Index}}{{end}}">