Merge branch '5.4' into 6.3

* 5.4:
  [Messenger] Fix cloned TraceableStack not unstacking the stack independently
  [DependencyInjection] Fix autocasting null env values to empty string with container.env_var_processors_locator
  [Cache] Fix support for Redis Sentinel using php-redis 6.0.0
  minor #51693 Disable the dead code analysis in Psalm (stof)
  Update the PR template
  [SecurityBundle][PasswordHasher] Fix password migration with custom hasher service with security bundle config
  [Translator] Fix support for `default_path` in XML
  [HttpClient] Fix TraceableResponse if response has no destruct method

Resources/config/schema/symfony-1.0.xsd

@@ -237,6 +237,7 @@
         <xsd:attribute name="logging" type="xsd:boolean" />
         <xsd:attribute name="formatter" type="xsd:string" />
         <xsd:attribute name="cache-dir" type="xsd:string" />
+        <xsd:attribute name="default-path" type="xsd:string" />
     </xsd:complexType>
 
     <xsd:complexType name="pseudo_localization">