Replace getStatusLine on HttpResponse

[joanvr]

What's changed?

HttpResponse::getStatusLine has been removed in Apache HttpClient 5.x, you can call the getStatusCode, getProtocolVersion and getReasonPhrase directly on the HttpResponse object.
When applicable, we will apply a simplify method chain, but for scenarios where the StatusLine is stored or used directly, we are going to instantiate a StatusLine object (which has the same previous 4.x methods) with the response object.

Checklist

• I've added unit tests to cover both positive and negative cases
• I've added the license header to any new files through ./gradlew licenseFormat
• I've used the IntelliJ auto-formatter on affected files