Merge branch '6.4' into 7.1

* 6.4:
  [Form] Remove unnecessary imports
  minor #58472 CS: clean some whitespaces/indentation (keradus)
  Fix newline
  harden test to not depend on the system's configured default timezone
  [Form] Support intl.use_exceptions/error_level in NumberToLocalizedStringTransformer
  [Doctrine][Messenger] Use common sequence name to get id from Oracle
  [ExpressionLanguage] Add missing test case for `Lexer`
  [FrameworkBundle] Fix passing request_stack to session.listener
  ensure session storages are opened in tests before destroying them
  [Serializer] Fix `ObjectNormalizer` gives warnings on normalizing with public static property
  [HttpKernel] Correctly merge `max-age`/`s-maxage` and `Expires` headers
  [Security][Validator] Check translations for Czech
  [Security] Fix serialized object representation in tests
  [DoctrineBridge] Fix risky test warnings
  [Serializer] Catch `NotNormalizableValueException` for variadic parameters