[BUG][GO] Generated client code creates duplicate type names & anonymous interfaces rather than types

Description

I am unable to generate golang client bindings for the lichess public api (https://lichess.org/api). The generated code fails to compile due to duplicate type names being generated. Secondly, in many cases the generated code employs anonymous interface{} for many objects which should instead be defined & named types based on the input description.

Input was validated with https://apidevtools.org/swagger-parser/online

openapi-generator version

6.2.0

OpenAPI declaration file content or url

https://github.com/mikeb26/lichess-go-sdk/blob/285cd412550179208649530859434e3b812cf231/openapi.json

Generation Details

java -jar ./openapi-generator-cli.jar generate -g go -o ./openapi --git-host github.com --git-user-id mikeb26 --git-repo-id lichess-go-sdk -i openapi.json

Steps to reproduce

git clone https://raw.githubusercontent.com/mikeb26/lichess-go-sdk
cd lichess-go-sdk
git checkout 285cd412
rm -rf openapi
make

Related issues/PRs

could not find related PRs

Suggest a fix

It appears there are 2 problems:

1. in a couple of cases the input re-uses the same type across different api endpoints. an easy fix would be to have the generator prefix the generated type names with the api name. (i did this manually by manually editing the generated code).
2. the generated code is returning responses with anonymous interface{} types rather than defining a type based on the spec. the input spec. I don't have a guess as to why this is occurring.

Reproduce the issue with the referenced openapi.json, the Go generator, and the listed clone, checkout, cleanup, and make commands. Inspect the generated openapi output for duplicate type names and anonymous interface{} responses. Done means the generated Go client compiles and the affected objects have distinct named types.