speedsup p2p sync

A new object to control state of syncig added. There are 3 state of sync: p2p, reindex and live. P2P and REINDEX sync used the same massive dumper of blocks to database, but the have different triggers -> P2P dumps at least 1000 blocks but all of them must be considered by node as irreversible, REINDEX unconditionally dumps packages of 1000 of blocks because a block_log contains only irreversible blocks. LIVE sync uses llive dumper, and dumps blocks one by one with calling 'hive.push_block' hive fork manager function.

src/sql_serializer/include/hive/plugins/sql_serializer/data_dumper.h

@@ -8,6 +8,5 @@ namespace hive::plugins::sql_serializer {
     virtual ~data_dumper() = default;
 
     virtual void trigger_data_flush( cached_data_t& cached_data, int last_block_num ) = 0;
-    virtual uint32_t blocks_per_flush() const = 0;
   };
 } // namespace hive::plugins::sql_serializer
\ No newline at end of file