[swift5] adds configuration of response success ranges

[Jonas1893]

The success range of a HTTP response which defines whether a response should be treated as successful or failed is currently hardcoded in the URLSession / AlamofireImplementations to 200..<300. There are use cases where users of the generator do not want the request to fail if a response code is outside this range, like e.g. when status code is in 3** range.

This PR solves problem 2. described in #13597 by adding a new parameter successfulStatusCodeRange to Configuration which is injected into response validations for Alamofire and URLSession libraries (not applicable for Vapor). If unchanged the behavior remains the same as before for both libraries

This change is the basis for an implementation of follow redirects in the generator which are currently silently performed but the response data is discarded. I would propose an implementation of follow redirects in a separate PR, this change here is independent of it and has benefits past the scope of just follow redirects, that's why I separated it.

PR checklist

• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• Run the following to build the project and update samples:

  ./mvnw clean package 
  ./bin/generate-samples.sh
  ./bin/utils/export_docs_generators.sh
  

  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
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Declaration

The program was tested solely for our own use cases, which might differ from yours.

Link to provider information

https://github.com/mercedes-benz

[4brunu]

Looks good to me 👍