Make compatible with `doctrine/persistence` 4.0

Feature Request

What

See https://github.com/doctrine/persistence/releases/tag/4.0.0

Why

How

doctrine/orm, symfony/doctrine-bridge needs to support it first

For ORM it's done but not released yet.

ORM 3.3.1 has been released and there is support for doctrine/persistence ^4.0

Ok. Now symfony/doctrine-bridge

@kaskader201 that's cause it was contributed to 3.4.x, cause this is not a bugfix.

Misread as "and there is no support"… there is support indeed, I accidentally released this as 3.3.1, so yeah, this blocker is removed 🤦

My attempt: https://github.com/symfony/symfony/pull/59575

New symfony/doctrine-bridge versions compatible with doctrine/persistence 4 have been released

I guess this issue can be closed as completed with the linked PR.