Use rootURL in Cloud sidepanel so links in actions work properly (jenkinsci#26004)

* Use absolute URL in Cloud sidepanel

The urls in the sidepanel of a cloud are relative. When an action is
added to the cloud these urls lead to a 404 as the action has a
different path.

fixes jenkinsci#26002

* Update core/src/main/resources/hudson/slaves/Cloud/sidepanel.jelly

Co-authored-by: Alexander Brandes <[email protected]>

---------

Co-authored-by: Alexander Brandes <[email protected]>

Author: mawinter69

core/src/main/resources/hudson/slaves/Cloud/sidepanel.jelly

@@ -27,10 +27,11 @@ THE SOFTWARE.
     <l:header />
     <l:side-panel>
         <l:tasks>
-            <l:task contextMenu="false" href="." icon="symbol-computer" title="${%Status}"/>
-            <l:task href="configure" icon="symbol-settings"
+            <j:set var="url" value="${h.getNearestAncestorUrl(request2,it)}"/>
+            <l:task contextMenu="false" href="${url}/" icon="symbol-computer" title="${%Status}"/>
+            <l:task href="${url}/configure" icon="symbol-settings"
                     title="${app.hasPermission(app.ADMINISTER) ? '%Configure' : '%View Configuration'}"/>
-            <l:delete permission="${app.ADMINISTER}" title="${%Delete Cloud}" message="${%delete.cloud(it.displayName)}"/>
+            <l:delete permission="${app.ADMINISTER}" title="${%Delete Cloud}" message="${%delete.cloud(it.displayName)}" urlPrefix="${url}"/>
             <t:actions />
         </l:tasks>
         <j:forEach var="action" items="${it.allActions}">