Merge branch '3.3' into 3.4

* 3.3:
  [Profiler] Fix data collector getCasters() call
  remove symfony/process suggestion
  [DI] Remove unused dynamic property
  [Process] Fixed issue between process builder and exec
  non-conflicting anonymous service ids across files

Author: nicolas-grekas

composer.json

@@ -80,7 +80,6 @@
         "symfony/validator": "For using validation",
         "symfony/yaml": "For using the debug:config and lint:yaml commands",
         "symfony/property-info": "For using the property_info service",
-        "symfony/process": "For using the server:run, server:start, server:stop, and server:status commands",
         "symfony/web-link": "For using web links, features such as preloading, prefetching or prerendering"
     },
     "autoload": {