[NEW] more rocksdb options supporting for write stall needed

[sjpcg]

In my tests, when I ran a new compaction strategy that combined an automatic compation operation with a compaction checker, MY disk space was blown up so fast that level5 reclamation was slow and my disk ran the risk of being full. If I change this to auto compaction+cron compaction(hourly), it will trigger a write stall that usually lasts more than half an hour and performs poorly. When I read the log, I usually write stall because level0FIleNum is too large, so I set this parameter to a larger value. However, something new happens, such as Estimated Pending compaction bytes, so I want to change this parameter by changing the configuration file. It turns out that kVRocks is not currently supported, so more rockDB parameters need to be supported, not just this one, or have other good suggestions？thanks

[git-hulk]

@sjpcg Thanks for your feedback. We need to find a new way to let users customize RocksDB options since it's impossible to integrate those options at once, and too trivial to add new option till users want it.

[sjpcg]

It's for the best. Thank you for your efforts