Add a base mode that can execute a specified SQL statement and benchmark/measure the query latency metrics

[zerolbsony]

How to use the mode?
Edit the config.properties, remove the comment symbols in front of these parameters, and adjust their values, for example:

BENCHMARK_WORK_MODE=fixedQueryMode
DATA_CLIENT_NUMBER=20
OP_MIN_INTERVAL=30000
FIXED_QUERY_SQL=SELECT data_node_id, client_ip FROM information_schema.connections
QUERY_LOOP=10