[v12.x] build: pin Windows GitHub runner to windows-2019
GitHub is removing the Windows 2016 runner image on March 15, 2022.
March 15, 2022 is today
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
GitHub is removing the Windows 2016 runner image on March 15, 2022.
March 15, 2022 is today