Remove List suffix in generated code

[ChloePlanet]

For sysl endpoints

Simple "Simple Server" [package="simple"]:
    @basePath = "/simple"
    @go_package = "simple"

    /just-return-ok:
        GET:
            return ok

should remove List suffix in requestrouter.go, service.go, servicehandler.go, serviceinterface.go:

- // GetJustOkAndJustErrorList ...
+ // GetJustOkAndJustError ...
- func (s *Client) GetJustOkAndJustErrorList(ctx context.Context, req *GetJustOkAndJustErrorListRequest) (*http.Header, error) {
+ func (s *Client) GetJustOkAndJustError(ctx context.Context, req *GetJustOkAndJustErrorRequest) (*http.Header, error) {
    // ...
}

[ChloePlanet]

@gkanz any context for why we add List suffix the first time?