feat: drop MySQL and SQLServer support

see https://forge.extranet.logilab.fr/cubicweb/cubicweb/-/jobs/269972
for !229

--HG--
branch : 3.29
8 jobs for !231 with topic/3.29/3-29_rm-mysql in 33 minutes and 57 seconds (queued for 20 minutes and 1 second)
latest merge request
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py3_web Tests There has been a runner system failure, please try again
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-6p4xpd to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-6p4xpd to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-6p4xpd to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-6p4xpd to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-6p4xpd to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-6p4xpd to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-6p4xpd to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-6p4xpd to be running, status is Pending
ERROR: Job failed (system failure): prepare environment: timed out waiting for pod to start. Check https://docs.gitlab.com/runner/shells/index.html#shell-profile-loading for more information
failed
py3-from-forge-misc Tests There has been a runner system failure, please try again
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-96wf4f to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-96wf4f to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-96wf4f to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-96wf4f to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-96wf4f to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-96wf4f to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-96wf4f to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-96wf4f to be running, status is Pending
ERROR: Job failed (system failure): prepare environment: timed out waiting for pod to start. Check https://docs.gitlab.com/runner/shells/index.html#shell-profile-loading for more information
failed
py3-from-forge-server Tests There has been a runner system failure, please try again
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-7jg4nc to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-7jg4nc to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-7jg4nc to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-7jg4nc to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-7jg4nc to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-7jg4nc to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-7jg4nc to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-7jg4nc to be running, status is Pending
ERROR: Job failed (system failure): prepare environment: timed out waiting for pod to start. Check https://docs.gitlab.com/runner/shells/index.html#shell-profile-loading for more information
failed
py3_misc Tests There has been a runner system failure, please try again
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-4lvqzw to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-4lvqzw to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-4lvqzw to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-4lvqzw to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-4lvqzw to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-4lvqzw to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-4lvqzw to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-4lvqzw to be running, status is Pending
ERROR: Job failed (system failure): prepare environment: timed out waiting for pod to start. Check https://docs.gitlab.com/runner/shells/index.html#shell-profile-loading for more information
failed
py3-from-forge-web Tests There has been a runner system failure, please try again
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-86r269 to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-86r269 to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-86r269 to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-86r269 to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-86r269 to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-86r269 to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-86r269 to be running, status is Pending
Waiting for pod heptapod-runner/runner-4warkre-project-385-concurrent-86r269 to be running, status is Pending
ERROR: Job failed (system failure): prepare environment: timed out waiting for pod to start. Check https://docs.gitlab.com/runner/shells/index.html#shell-profile-loading for more information