[Validator] Add additional hint when egulias/email-validator
needs to be installed
#47189
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When using the
Symfony\Component\Validator\Constraints\Email
constraint with'mode' => 'strict'
, a helpful error message is shown when the necessary package is not installed.However, when configuring
strict
mode as a framework setting (https://symfony.com/doc/current/reference/configuration/framework.html#email-validation-mode) and omitting themode
setting on the constraint itself, that message was missing.