Pull in the CI docker image v0.21.0, which contains the Zephyr SDK
0.13.2 release, and use the Zephyr SDK 0.13.2 for building and testing
Zephyr in the CI.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
Add a code coverage collection action that triggers based on a schedule
on the main branch and posts results to
https://app.codecov.io/gh/zephyrproject-rtos/zephyr
Signed-off-by: Anas Nashif <anas.nashif@intel.com>