Upgrade go version to 1.19

[purelind]

Enhancement

Upgrade go version to 1.19

[purelind]

make check failed

go version go1.19 linux/amd64
gofmt (simplify)
./pkg/sql/sql.go
./pkg/loader/util.go
./pkg/loader/load.go
./drainer/loopbacksync/loopbacksync.go
./drainer/sync/mysql_test.go
./drainer/sync/syncer_test.go
./drainer/sync/oracle_test.go
./drainer/binlog_item.go
./drainer/translator/oracle_test.go
./pump/storage/sorter.go
./pump/storage/vlog.go
make: *** [fmt] Error 1