Use non deprecated MySQL dialect for Hibernate 6+

This commit fixes the Hibernate dialect lookup for MySQL as it was
previously using a deprecated dialect that has been removed in the most
recent Hibernate version.

Closes gh-31889

spring-orm/src/main/java/org/springframework/orm/jpa/vendor/HibernateJpaVendorAdapter.java

@@ -34,6 +34,7 @@
 import org.hibernate.dialect.HSQLDialect;
 import org.hibernate.dialect.Informix10Dialect;
 import org.hibernate.dialect.MySQL57Dialect;
+import org.hibernate.dialect.MySQLDialect;
 import org.hibernate.dialect.Oracle12cDialect;
 import org.hibernate.dialect.PostgreSQL95Dialect;
 import org.hibernate.dialect.SQLServer2012Dialect;
@@ -193,14 +194,14 @@ protected Class<?> determineDatabaseDialectClass(Database database) {
 				default -> null;
 			};
 		}
-		else {  // Hibernate 6.2 aligned
+		else {  // Hibernate 6.2+ aligned
 			return switch (database) {
 				case DB2 -> DB2Dialect.class;
 				case DERBY -> org.hibernate.dialect.DerbyDialect.class;
 				case H2 -> H2Dialect.class;
 				case HANA -> HANAColumnStoreDialect.class;
 				case HSQL -> HSQLDialect.class;
-				case MYSQL -> MySQL57Dialect.class;
+				case MYSQL -> MySQLDialect.class;
 				case ORACLE -> Oracle12cDialect.class;
 				case POSTGRESQL -> org.hibernate.dialect.PostgreSQLDialect.class;
 				case SQL_SERVER -> SQLServer2012Dialect.class;