ci: Update to Zephyr SDK 0.14.0

Pull in the CI docker image v0.22.0, which contains the Zephyr SDK
0.14.0 release, and use the Zephyr SDK 0.14.0 for building and testing
Zephyr in the CI.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
7 files changed