Merge branch '6.3' into 6.4

* 6.3:
  [Validator] Add annotation in Constraint
  [VarExporter] Remove unused test files
  [FrameworkBundle] Remove unused test file
  [DependencyInjection] Remove unused test file
  [HttpKernel] Fix missing Request in RequestStack for StreamedResponse
  Psalm: Ignore UnusedClass errors
  fix(console): avoid multiple new line when message already ends with a new line

Author: nicolas-grekas

Constraint.php

@@ -46,6 +46,8 @@ abstract class Constraint
 
     /**
      * Maps error codes to the names of their constants.
+     *
+     * @var array<string, string>
      */
     protected const ERROR_NAMES = [];