Directive resolver input arguments type ignores enumPrefix = false

[bmarker]

Describe the bug
The generated directive arguments ignore enumPrefix = false. This results in the wrong type name when typesPrefix is set.

To Reproduce
https://codesandbox.io/s/pedantic-lalande-q0g1qr?file=/types.ts

Set enumPrefix = false and typesPrefix = I.

Define a directive with an input argument that is an enum and generate the resolvers.

1. My GraphQL schema:

enum TestEnum {
    ONE
    TWO
}

directive @debug(in: TestEnum) on FIELD_DEFINITION | OBJECT

2. My GraphQL operations:
   None

3. My codegen.yml config file:

schema: schema.graphql
generates:
  types.ts:
    plugins:
      - typescript
      - typescript-resolvers
    config:
      typesPrefix: I
      enumPrefix: false
      defaultMapper: unknown

Setting defaultMapper works around another name collision with the default IResolversTypes and IResolversParentTypes. Normally I'd map the model types.

Expected behavior
Does not add the types prefix to the enum type in the input args type for the directive resolver.

Environment:
https://codesandbox.io/s/pedantic-lalande-q0g1qr?file=/types.ts

    "@graphql-codegen/add": "^3.1.1",
    "@graphql-codegen/cli": "^2.4.0",
    "@graphql-codegen/typescript": "2.4.5",
    "@graphql-codegen/typescript-resolvers": "2.5.2",
    "graphql": "^16.2.0"

Additional context
I don't actually need the directives so a skip directives option would work as well.
I may be able to get a hook to rename it as a workaround for now.

[bmarker]

Specifically generating this code:

export type IDebugDirectiveArgs = {
  in?: Maybe<ITestEnum>;
};

Instead of this code:

export type IDebugDirectiveArgs = {
  in?: Maybe<TestEnum>;
};