[BUG] [scala-sttp] api.mustache template specifies the incorrect return type

[reddicj]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

The return type of each operation is incorrect. Currently the template defines it as this:

def {{operationId}}({{>methodParameters}}): Request[{{#separateErrorChannel}}Either[ResponseException[String, Exception], {{>operationReturnType}}]{{/separateErrorChannel}}{{^separateErrorChannel}}{{>operationReturnType}}{{/separateErrorChannel}}, Nothing] =

But it should be this:

def {{operationId}}({{>methodParameters}}): Request[{{#separateErrorChannel}}Either[ResponseException[String, Exception], {{>operationReturnType}}]{{/separateErrorChannel}}{{^separateErrorChannel}}{{>operationReturnType}}{{/separateErrorChannel}}, Any] =

i.e. Nothing should be Any

openapi-generator version

6.0.1

OpenAPI declaration file content or url

Generation Details

Using Coursier launch:

 cs launch org.openapitools:openapi-generator-cli:6.0.1 -- generate \
  -i api.yaml \
  -g scala-sttp \
  -o out

Steps to reproduce

See the sttp docs:
https://sttp.softwaremill.com/en/latest/requests/type.html

Related issues/PRs

Suggest a fix

Suggested above.

[reddicj]

I see this issue is fixed in this PR #11949.

[fserra-mdsol]

This has not been fixed yet, as the PR with the fix has not been merged