suppress quick fixes for output of derive macros

[programmerjake]

I have a derive macro that generates new types based off the variant names of an enum, so for the enum:

pub enum Enum1 {
    A,
}

it generates code like so:

    #[allow(non_snake_case)]
    #[allow(non_camel_case_types)]
    #[allow(non_upper_case_globals)]
    mod __Enum1__impl_Value {
        #![no_implicit_prelude]
        use super::*;
        const __Enum1_A_discriminant__: isize = 0;
        // ...
        pub struct __Enum1_A_field_values__<'ctx>(
            pub ::core::marker::PhantomData<(Enum1, &'ctx ())>,
        );
        // ...
        pub struct __StructOfVariantValues<'ctx> {
            pub A: __Enum1_A_field_values__<'ctx>,
            pub __aggregate_phantom: ::core::marker::PhantomData<(Enum1, &'ctx ())>,
        }
        // ...
    }

This causes rust-analyzer to generate a bunch of incorrect quick fixes like:

Structure `__Enum1_A_field_values__` should have CamelCase name, e.g. `Enum1AFieldValues` rust-analyzer(incorrect-ident-case)

and:

Field `A` should have snake_case name, e.g. `a` rust-analyzer(incorrect-ident-case)

[lnicola]

Probably a duplicate of #8747.