BUGFIX: Adjust to PHP 8.3 get_parent_class() deprecation

[lorenzulrich]

Somehow, https://github.com/neos/flow-development-collection/pull/3351/files only targeted Flow 9.0, but per the docs, Flow 8.3 also supports PHP 8.3.
This is just a backport of these changes.

[kitsunet]

Thank you! :) Good catch

[lorenzulrich]

Please do not merge this. For reasons still unknown to me, this leads to the following exception when querying repositories that extend other repositories:

Call to a member function createQueryForType() on null

  Type: Error
  File: Packages/Framework/Neos.Flow/Classes/Persistence/Repository.php
  Line: 137

So somehow this leads to the PersistenceManager not being available.

[lorenzulrich]

See further comments in #3351

[mhsdesign]

hmmm thanks for your pr ... but that error would be odd to be caused by this change? I myself am using php 8.3.7 with the mentioned Flow 9.0 fix and i be we have extended repositories ourselves?

[kdambekalns]

I did exactly this change in a project yesterday… great to see there's a PR already. 🤣

[kdambekalns]

I, too, doubt that this causes the regression, see also #3351 (comment)