Different updates, fresh repositories, see list

* new archives of mos-spt, cfg-checker, si-tests
* run tempest full with concurrency 4
* updated mos-spt configuration
* fixed manual_create_signed_images.sh script
* improved prepare.sh script

Related-PROD: PROD-37187
Change-Id: I41a34026f7cd593145173ff330e19c59bb8325d3
10 files changed