Remove deprecation DEPPS5: Config option `allowClientClassCreation` defaults to `false`

### New Feature / Enhancement Checklist


- [x] I am not disclosing a [vulnerability](https://github.com/parse-community/parse-server/blob/master/SECURITY.md).
- [x] I am not just asking a [question](https://github.com/parse-community/.github/blob/master/SUPPORT.md).
- [x] I have searched through [existing issues](https://github.com/parse-community/parse-server/issues?q=is%3Aissue).

### Feature / Enhancement Description

Remove deprecation DEPPS5: Config option `allowClientClassCreation` defaults to `false`

### References 

https://github.com/parse-community/parse-server/pull/7925

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Remove deprecation DEPPS5: Config option `allowClientClassCreation` defaults to `false` #8841

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Remove deprecation DEPPS5: Config option allowClientClassCreation defaults to false #8841

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Remove deprecation DEPPS5: Config option `allowClientClassCreation` defaults to `false` #8841