Fix parameters position calculation

[asvishnyakov]

#2891

[RicoSuter]

I think this is a breaking change and cannot be merged - also tests are failing.

[asvishnyakov]

@RicoSuter I don't think failed tests are related to PR changes. The error is about missed nuget packages. Probably we need to run checks for PR again. Please check your tests and CI.

Yes, it's breaking changes, but without that fix Position parameter will work only if you have GenerateOptionalParameters option enabled, which is not useful, because optional parameters are always last, so you never can have your parameters correctly ordered. We probably need introduce new option for that case

[asvishnyakov]

@RicoSuter As I said tests failed not because of these changes. After merging latest changes from master (and CI run caused by that), everything passed. Please review and merge is possible or ask me for changes

[RicoSuter]

I'm very afraid to break many people as this might reorder parameters.