ci: Archive the build log and parse the test result to JUnit format

Major changes:
* Store the log artifacts after the build
* Parse the test log to generate a junit file of the results
* Install the module required by yoctoqa-to-junit.py

Changelog: other
Signed-off-by: Robbie Cao <robbie.cao@arm.com>
Signed-off-by: Jingzhao Ni <Jingzhao.Ni@arm.com>