Comply with Drupal coding standards (31) (phpstan)

Problem/Motivation

• Fix coding standard errors by phpstan at d.o
  

  ------ ----------------------------------------------------------------------- 
    Line   src/Controller/CloudConfigController.php                               
   ------ ----------------------------------------------------------------------- 
    240    Call to deprecated method renderPlain() of class                       
           Drupal\Core\Render\RendererInterface:                                  
           in drupal:10.3.0 and is removed from drupal:12.0.0. Use                
             \Drupal\Core\Render\RendererInterface::renderInIsolation() instead.  
   ------ ----------------------------------------------------------------------- 
   ------ ----------------------------------------------------------------------- 
    Line   src/Controller/CloudLaunchTemplateController.php                       
   ------ ----------------------------------------------------------------------- 
    251    Call to deprecated method renderPlain() of class                       
           Drupal\Core\Render\RendererInterface:                                  
           in drupal:10.3.0 and is removed from drupal:12.0.0. Use                
             \Drupal\Core\Render\RendererInterface::renderInIsolation() instead.  
   ------ ----------------------------------------------------------------------- 
   ------ ----------------------------------------------------------------------- 
    Line   src/Controller/CloudProjectController.php                              
   ------ ----------------------------------------------------------------------- 
    249    Call to deprecated method renderPlain() of class                       
           Drupal\Core\Render\RendererInterface:                                  
           in drupal:10.3.0 and is removed from drupal:12.0.0. Use                
             \Drupal\Core\Render\RendererInterface::renderInIsolation() instead.  
   ------ ----------------------------------------------------------------------- 
   ------ ----------------------------------------------------------------------- 
    Line   src/Controller/CloudStoreController.php                                
   ------ ----------------------------------------------------------------------- 
    247    Call to deprecated method renderPlain() of class                       
           Drupal\Core\Render\RendererInterface:                                  
           in drupal:10.3.0 and is removed from drupal:12.0.0. Use                
             \Drupal\Core\Render\RendererInterface::renderInIsolation() instead.  
   ------ ----------------------------------------------------------------------- 
   ------ ------------------------------------------------------------------- 
    Line   src/Entity/CloudPermissions.php                                    
   ------ ------------------------------------------------------------------- 
    66     Call to deprecated method getName() of class                       
           Drupal\Core\Extension\ModuleHandlerInterface:                      
           in drupal:10.3.0 and is removed from drupal:12.0.0.                
             Use \Drupal::service('extension.list.module')->getName($module)  
           instead.                                                           
   ------ ------------------------------------------------------------------- 
   [ERROR] Found 5 errors