fix: ignore infinite metrics value #8960
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influxdb 不支持 inf 类型的数据，flink 的 metrics 会产生挺多这样的数据，直接上的话 taskManager 会一直抛异常。
目前已经有 issue 提到了这个事情，https://issues.apache.org/jira/browse/FLINK-12147 ，不过看上去好像 flink 社区想推 influxdb 做一些改动支持 inf，感觉得等挺久的，这边先做一个 workaround 。