[BUG] Flash CF option level_compaction_dynamic_level_bytes is reset to default after "flushall"

[karthyuom]

Describe the bug
There is a bug where the rocksdb column family (CF) option level_compaction_dynamic_level_bytes, which is set to true inside the keydb code, has been reset back to the default false after the "flushall" command is executed.

To reproduce

1. Start the keydb server with "flash" enabled
   keydb.conf:

   port 9000
   databases 1
   storage-provider flash /opt/redis/data
   

2. Populate data from keydb-cli

   127.0.0.1:9000> set k1 v1
   OK

3. Check the column family option for the column family name "CF 0" in OPTIONS-* file which presents under the flash folder specified above, and the result will look something like this:

   [CFOptions "0"]
   ...
   level_compaction_dynamic_level_bytes=true
   inplace_update_support=false
   table_factory=BlockBasedTable
   

4. Execute the "flushall" command from keydb-cli

   127.0.0.1:9000> FLUSHALL
   OK

5. Repeat the step 3, and the result will look something like this:

   [CFOptions "0"]
   ...
   level_compaction_dynamic_level_bytes=false
   inplace_update_support=false
   table_factory=BlockBasedTable
   

Expected behavior

The modified column family options should be applied correctly even after the "flushall".

Additional information

N/A

@paulmchen @hengku @yzhao244