This commit takes the QEMU/Arm CI build and test step and splits it into
three separate steps (bigendian, sabrelite, thumb), to allow them to run
in parallel.
Currently the QEMU/Arm CI build step would take up to 16 minutes, often
being the last step blocking a full test run. With this commit, when
the steps run in parallel the time it takes to complete the QEMU/Arm
build and test procedure is cut in half - taking between 8 to 9 minutes
depending on the CI runner load.
The existing `ci_build_and_test_arm` function has been removed, in
favour of having three separate functions - one per configuration. They
are called `ci_build_and_test_arm_bigendian`,
`ci_build_and_test_arm_sabrelite`, and `ci_build_and_test_arm_thumb`.
Signed-off-by: Alessandro Gatti <a.gatti@frob.it>
b8e56a17b1