Removed Cranky and started using Cargo's lints table

[brunoffranca]

What ❔

Removes the Cranky tool and moves all existing lints to the workspace's Cargo.toml.

Why ❔

Lint configuration through Cargo was just stabilized in Rust, so we no longer need a third-party tool for it.

[pompon0]

The lint that is failing CI seems to be false positive. Please disable the corresponding linting rule.

[slowli]

@pompon0 The relevant rule (redundant_locals) is disabled; I think the problem is that the default Rust version included into the GitHub runner ATM is 1.73, which doesn't understand the lint section in workspace / crate manifests. We'd probably need to have a separate step installing Rust.

[brunoffranca]

The Github runner is still running Rust 1.73. We just need to wait until they bump the new version. No need to change anything else.