Move every db.Prepare to sqlutil.Statementlist, remove trace driver (#3026)

Doesn't buy us much, but makes everything a bit more consistent.

Also removes the SQL trace driver, as it is unused and the output is
hard to read anyway.

internal/sqlutil/sqlite_native.go

@@ -4,7 +4,6 @@
 package sqlutil
 
 import (
-	"modernc.org/sqlite"
 	"strings"
 )
 
@@ -23,7 +22,3 @@ func sqliteDSNExtension(dsn string) string {
 	dsn += "_pragma=busy_timeout%3d10000"
 	return dsn
 }
-
-func sqliteDriver() *sqlite.Driver {
-	return &sqlite.Driver{}
-}