test: hardcode clippy lints

[Manuthor]

add by default, on ckms and cosmian_kms_server this clippy config:

#![deny(
    nonstandard_style,
    refining_impl_trait,
    future_incompatible,
    keyword_idents,

  let_underscore,
    rust_2024_compatibility,
    clippy::all,
    clippy::suspicious,
    clippy::complexity,
    clippy::perf,
    clippy::style,
    clippy::pedantic,
    clippy::cargo
)]

Also replace in ckms all occurences of Result<Something, CliError> by CliResult<Something>