Migrate Arm CI Coverity (tf-coverity) job

This patch migrates the Arm CI job that triggers Coverity, one of the
static check tools used on the TF-A project.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I3682928953e58bb01e458bbaf13d78196cf2cc98
1 file changed