Use secured analyzer image for cluster image scanning

What does this MR do and why?

We have moved all images from registry.gitlab.com/gitlab-org/security-products/analuzer/cluster-image-scanning to registry.gitlab.com/security-products/cluster-image-scanning: this means we can use images from new location.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #338300 (closed)