version up: zc.buildout, slapos.recipe.build, Debian 10/11 netinst

Thanks to the new buildout/slapos.recipe.build feature,
we can download the last released version of Debian Stable.

NEO stress testing is changed to run on both Debian 10 & 11.

Keep proposing Debian 10 netinst in kvm SR,
waiting that Debian 11 is more tested.
10 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-Master.Python2

00:48:20

passed SlapOS.Eggs.UnitTest-Master.Python3

00:23:33

passed SlapOS.SlapRunner.ResilienceTest-Master

01:17:18

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

01:35:33

passed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

09:38:16

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

11:15:11

passed SlapOS.Eggs.UnitTest-Master.Python2

00:46:52

passed SlapOS.Eggs.UnitTest-Master.Python2

00:19:22

passed SlapOS.Eggs.UnitTest-Master.Python3

01:11:05

passed SlapOS.Eggs.UnitTest-Master.Python3

00:38:04