Only support prepare SelectStmt point query now

[wanlike]

I want to use sysbench to pressure test Apache Doris, but an error occurred

Running the test with following options:
Number of threads: 1
Report intermediate results every 1 second(s)
Initializing random number generator from current time

Initializing worker threads...

FATAL: mysql_stmt_prepare() failed
FATAL: MySQL error: 1105 "errCode = 2, detailMessage = Only support prepare SelectStmt point query now"
FATAL: `thread_init' function failed: /usr/local/share/sysbench/oltp_common.lua:285: SQL API error
FATAL: Thread initialization failed!