Buildability over all Zephyr samples

The Zephyr examples can also be instantiated with the help of the Zephyr Test Runner (Twister) and thus their buildability can be checked for their originally intended integration platforms (checks only ≈1.25% of all platforms, ≈1100 test scenarios).

Check all Zephyr samples:

$ west twister \
       --jobs 4 \
       --verbose \
       --inline-logs \
       --integration \
       --alt-config-root bridle/zephyr/alt-config/samples \
       --testsuite-root zephyr/samples \
       --tag zephyr