#available and #unavailable cannot be in the same statement

[Cyberbeni]

New Issue Checklist

• Updated SwiftLint to the latest version
• I searched for existing GitHub issues

Describe the bug

The following triggers the unavailable_condition warning but when using the recommended code, it gives compiler error

if #available(macOS 11.0, *) {
   // Do nothing
} else if #available(macOS 10.15, *) {
   print("do some stuff")
}

if #unavailable(macOS 11.0, *),  #available(macOS 10.15, *) { // #available and #unavailable cannot be in the same statement
   print("do some stuff")
}

Complete output when running SwiftLint, including the stack trace and command used

Environment

• SwiftLint version (run swiftlint version to be sure)? 0.47.1
• Installation method used (Homebrew, CocoaPods, building from source, etc)? Homebrew
• Paste your configuration file: -
• Are you using nested configurations? No
• Which Xcode version are you using (check xcodebuild -version)? Xcode 13.4 Build version 13F17a
• Do you have a sample that shows the issue? In the Describe the bug section