Use Ubuntu 20 for vtgate and tabletmanager workflows (#11152)
Use Ubuntu 20 for vtgate and tabletmanager workflows (#11152)

Signed-off-by: Florent Poinsard <3ed0b581b0418fb64e36dc5b436646200f1f1df7@outlook.fr>

Signed-off-by: Florent Poinsard <3ed0b581b0418fb64e36dc5b436646200f1f1df7@outlook.fr>
vitessio/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess