…Factory (Tyraelqp)This PR was squashed before being merged into the 5.4 branch.Discussion----------[Mailer] Add support of ping_threshold to SesTransportFactory| Q             | A| ------------- | ---| Branch?       | 5.4| Bug fix?      | no| New feature?  | Yes| Deprecations? | no| Tickets       |Fix#39044| License       | MIT| Doc PR        |symfony/symfony-docs#15557Added support of ping_threshold option to `SesTransportFactory` for `ses+smtp` and `ses+smtps` schemes. Needed because SES closes SMTP connection after 10 seconds of inactivity and `TransportException` will be thrown on next send: `Expected response code "250" but got code "451", with message "451 4.4.2 Timeout waiting for data from client.".`Commits-------2e50135 [Mailer] Add support of ping_threshold to SesTransportFactory