BUGFIX: Set property to null via objects yaml

[mhsdesign]

This is probably similar to an autowiring: false option, but this does not exist as far as i debugged things for separate properties via objects yaml

The idea was to have an optional object, which can be removed via settings

#[Flow\Inject]
protected SomeService|null $someService = null;

Foo\Bar\Buz:
  properties:
    someService:
      value: null

At the current state invalid php code is generated, see = ; which causes php to fail during parsing:

if (\Neos\Utility\ObjectAccess::setProperty($this, 'someService', ) === false) { $this->someService = ;}

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[kitsunet]

LOL thx github