Update survey builder OS version (#984)

Required:

Task/Issue URL: https://app.asana.com/0/414235014887631/1208279548359774/f
iOS PR: duckduckgo/iOS#3348
macOS PR: duckduckgo/macos-browser#3247
What kind of version bump will this require?: Patch

Description:

This PR updates the survey builder to not include the major.minor.patch OS version, but instead only the major version.

Sources/RemoteMessaging/Mappers/DefaultRemoteMessagingSurveyURLBuilder.swift

@@ -58,7 +58,10 @@ public struct DefaultRemoteMessagingSurveyURLBuilder: RemoteMessagingSurveyActio
                     queryItems.append(URLQueryItem(name: parameter.rawValue, value: variant))
                 }
             case .osVersion:
-                queryItems.append(URLQueryItem(name: parameter.rawValue, value: AppVersion.shared.osVersion))
+                let os = ProcessInfo().operatingSystemVersion
+                let version = "\(os.majorVersion)"
+
+                queryItems.append(URLQueryItem(name: parameter.rawValue, value: version))
             case .appVersion:
                 queryItems.append(URLQueryItem(name: parameter.rawValue, value: AppVersion.shared.versionAndBuildNumber))
             case .hardwareModel: