MariaDB 10.5 adds a suffix on old datatypes

MariaDB when encountering an old datetime type will add a suffix of /* mariadb-5.3 */
on its schema information page. Xorm does not understand this and then its mappings
fail.

The simplest solution is just to remove any fixed suffix and that is what this PR does
- a clever solution would look for and remove any comments or match them.

See https://mariadb.com/kb/en/time/ for more details about the comment.

Signed-off-by: Andrew Thornton <art27@cantab.net>

dialects/mysql.go

@@ -353,6 +353,8 @@ func (db *mysql) GetColumns(queryer core.Queryer, ctx context.Context, tableName
 
 		cts := strings.Split(colType, "(")
 		colName := cts[0]
+		// Remove the /* mariadb-5.3 */ suffix from coltypes
+		colName = strings.TrimSuffix(colName, "/* mariadb-5.3 */")
 		colType = strings.ToUpper(colName)
 		var len1, len2 int
 		if len(cts) == 2 {