在Flink 官网savepoint的页面中，出现下面一段话 Starting from Flink 1.15 intermediate savepoints (savepoints other than created with stop-with-savepoint <https://nightlies.apache.org/flink/flink-docs-master/docs/ops/state/savepoints/#stopping-a-job-with-savepoint>) are not used for recovery and do not commit any side effects.
intermediate savepoints具体指的是什么呢？
