feat: Deprecation DEPPS5: Config option allowClientClassCreation defaults to false (#8849)

BREAKING CHANGE: The Parse Server option `allowClientClassCreation` defaults to `false`.

src/Config.js

@@ -90,6 +90,7 @@ export class Config {
     rateLimit,
     databaseOptions,
     extendSessionOnUse,
+    allowClientClassCreation,
   }) {
     if (masterKey === readOnlyMasterKey) {
       throw new Error('masterKey and readOnlyMasterKey should be different');
@@ -132,6 +133,7 @@ export class Config {
     this.validateRateLimit(rateLimit);
     this.validateLogLevels(logLevels);
     this.validateDatabaseOptions(databaseOptions);
+    this.validateAllowClientClassCreation(allowClientClassCreation);
   }
 
   static validateControllers({
@@ -174,6 +176,12 @@ export class Config {
     }
   }
 
+  static validateAllowClientClassCreation(allowClientClassCreation) {
+    if (typeof allowClientClassCreation !== 'boolean') {
+      throw 'Parse Server option allowClientClassCreation must be a boolean.';
+    }
+  }
+
   static validateSecurityOptions(security) {
     if (Object.prototype.toString.call(security) !== '[object Object]') {
       throw 'Parse Server option security must be an object.';