private_subject false positives in function scope

[ejensen]

New Issue Checklist

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

Describe the bug

Starting in SwiftLint 0.50.0 the private_subject rule triggers on function local variables. This was not the case in 0.49.1 and earlier.

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

$ swiftlint lint

Environment

• SwiftLint version (run swiftlint version to be sure)?
  • 0.50.3
• Installation method used (Homebrew, CocoaPods, building from source, etc)?
  • CocoaPods
• Paste your configuration file:

opt_in_rules:
  - private_subject

• Are you using nested configurations?
  • No
• Which Xcode version are you using (check xcodebuild -version)?
  • 14.1
• Do you have a sample that shows the issue?

func foo() {
    // This triggers a violation "Private Combine Subject Violation: Combine Subject should be private. (private_subject)":
    let goodSubject = PassthroughSubject<Bool, Never>(true)
}