Sync Coverity scripts with internal CI

Sync the scripts with platform-ci commit:
539c151d0cd99a5e6ca6c0e6966f6d8579fe864e

Signed-off-by: Zelalem <zelalem.aweke@arm.com>
Change-Id: I260c3490cc5079b66b735b03116af56501fa0642
10 files changed