MDL-55564 core_admin: Convert admin settings to use templates

Part of MDL-55071

admin/templates/setting_configselect.mustache

@@ -0,0 +1,27 @@
+{{!
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    Setting configselect.
+}}
+<div class="form-select defaultsnext">
+    <select id="{{id}}" name="{{name}}">
+        {{#options}}
+            <option value="{{value}}" {{#selected}}selected{{/selected}}>{{name}}</option>
+        {{/options}}
+    </select>
+</div>
+