`report_in_external_macro` importance check

[blyxyas]

In this tracking issue, we'll discuss the importance of linting in external macros of each one of this lints.

Lints to discuss

• derived_hash_with_manual_eq

• derive_ord_xor_partial_ord

• diverging_sub_expressions

• future_not_send

• wrong_self_convention

• option_env_unwrap

• recursive_format_impl

• unsafe_derive_deserialize