Merge patch series "Add preload_check_sign tool"

Paul HENRYS <paul.henrys_ext@softathome.com> says:

This serie of patches adds a new tool to authenticate files signed
with a preload header.
This tool is also used in the tests to actually verify the
authenticity of the file signed with such a preload header.

Link: https://lore.kernel.org/r/20250212093126.3722186-1-paul.henrys_ext@softathome.com