ci: Use CI_REGISTRY_IMAGE in image paths

The original use of CI_REGISTRY/CI_PROJECT_PATH results in invalid registry access paths as the CI_PROJECT_PATH could contain uppercase letters that are not allowed in registry paths. The change switches to the correctly formatted CI_REGISTRY_IMAGE variable in image references. Switch to new template version with the change to using CI_REGISTRY_IMAGE included.

Changelog: bug Signed-off-by: Drew Reed Drew.Reed@arm.com