Remove $context properties from ConstraintValidators

Problem/Motivation

In CommentNameConstraintValidator, EntityTestCompositeConstraintValidator and EntityTestEntityLevelValidator there is the following declaration:

  /**
   * Validator 2.5 and upwards compatible execution context.
   *
   * @var \Symfony\Component\Validator\Context\ExecutionContextInterface
   */
  protected $context;

The parent property is correctly typed already. Symfony 7 adds an actual typehint here, which causes type issues.

Steps to reproduce

Proposed resolution

Remove the property and rely on the parent class.

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet