gitlab: Switch to new container with sdk 0.15
gitlab: Switch to new container with sdk 0.15

Zephyr requires the sdk 0.15 or newer now.

BRANCH=None
BUG=None
TEST=Pushed to gitlab
https://gitlab.com/zephyr-ec/ec/-/pipelines/633794126

Signed-off-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@google.com>
Change-Id: Id802efcdeb9f391cd02f93aec923fd6c5764e854
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3880533
Commit-Queue: Aaron Massey <79529a820df71f45023239a3663736629646cc34@google.com>
Reviewed-by: Aaron Massey <79529a820df71f45023239a3663736629646cc34@google.com>
Auto-Submit: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Tested-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec