Imports of package tests

PathSynopsis
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/ClickHouse/clickhouse-go/v2/lib/driver
math/randPackage rand implements pseudo-random number generators suitable for tasks such as simulation, but it should not be used for security-sensitive work.
timePackage time provides functionality for measuring and displaying time.