[Properties] Set cpath when using AbstractElement::setProperty()

[BlackbitDevs]

When calling $element->setProperty('test', 'text', 'value') the field cpath does not get set. Thus you will get the error
E_DEPRECATED: strcmp(): Passing null to parameter #1 ($string1) of type string is deprecated in /var/www/html/vendor/pimcore/pimcore/models/DataObject/AbstractObject/Dao.php, line 254
in

pimcore/models/DataObject/AbstractObject/Dao.php

Line 237 in e22a820

return strcmp($left['cpath'], $right['cpath']);

This PR on the one hand sets the cpath when using setProperty() and on the other hand prevents above deprecation message if it is not set.

[github-actions]

Review Checklist

• Target branch (11.0 for bug fixes, others 11.x)
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[robertSt7]

@BlackbitDevs Sorry, but I am not able to reproduce it. For me the cpath is always set. Could you please provide all steps to reproduce it? Thanks

[BlackbitDevs]

@robertSt7 Sorry, it works when the element gets saved - like for data objects in

pimcore/models/DataObject/AbstractObject.php

Line 734 in 39f164a

$property->setCpath($this->getRealFullPath());

But it does not work when calling $property->save() directly, e.g.

$property = new \Pimcore\Model\Property();
$property = new Property();
$property->setValues([
    'cid' => 123,
    'ctype' => 'object',
    'type' => 'text',
    'name' => 'test',
    'data' => 'value',
    'inheritable' => 0,
    'inherited' => 0
]);
$property->save();

$object = \Pimcore\Model\DataObject::getById(123); // will trigger deprecation error

So my PR description was not correct, you are right. But following defensive programming it should be able to handle null values for cpath as this column is nullable. So no matter HOW such values could get into database, there should not be an error if there is null.
Have adjusted this PR to fall back to retrieving the cpath from the owner element when it is not set.

[sonarcloud]

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[robertSt7]

@BlackbitDevs Thanks for the fix :)