FileRequestLogger is prone to clock drift

[`FileRequestLogger`](https://github.com/apache/druid/blob/master/server/src/main/java/org/apache/druid/server/log/FileRequestLogger.java) must not be provided with `ScheduledThreadPoolExecutor` to rotate request file logs and increment `currentDay`:
https://github.com/apache/druid/blob/6ee0afa8e5cdfd36409ef78b236bba085c40c892/server/src/main/java/org/apache/druid/server/log/FileRequestLogger.java#L84-L108

Because `ScheduledThreadPoolExecutor` is prone to [unbounded clock drift](https://medium.com/@leventov/cronscheduler-a-reliable-java-scheduler-for-external-interactions-cb7ce4a4f2cd).

[CronScheduler](https://github.com/TimeAndSpaceIO/CronScheduler) could be used instead.

Start with server/src/main/java/org/apache/druid/server/log/FileRequestLogger.java around lines 84-108 and review how ScheduledThreadPoolExecutor rotates request logs and increments currentDay. Evaluate the proposed CronScheduler replacement, with done meaning log rotation and currentDay updates no longer suffer from unbounded clock drift.

Written by the indexing model from the issue text.