HHH-18362 Fix for Informix function substring() error

Author: VladoKuruc

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixDialect.java

@@ -305,8 +305,7 @@ public void initializeFunctionRegistry(FunctionContributions functionContributio
 		CommonFunctionFactory functionFactory = new CommonFunctionFactory(functionContributions);
 		functionFactory.instr();
 		functionFactory.substr();
-		functionFactory.substring_substr();
-		//also natively supports ANSI-style substring()
+		functionFactory.substringFromFor();
 		functionFactory.trunc();
 		functionFactory.trim2();
 		functionFactory.space();