`vertical_whitespace_between_cases` does not play nicely with `#if` guards

Describe the bug

vertical_whitespace_between_cases does not play nicely with #if guards, unexpectedly inserts an extra newline inside the guard.

Environment

disabled_rules:
 - switch_case_alignment

opt_in_rules:
 - vertical_whitespace_between_cases

Command

$ swiftlint --config rules.yml test.swift --fix
Correcting Swift files at paths test.swift
Correcting 'test.swift' (1/1)
test.swift:10:15 Corrected Vertical Whitespace Between Cases
Done inspecting 1 file for auto-correction!

Input (expected to be unchanged)

enum MyEnum {
    case one
    case two
}

let value = MyEnum.one
switch value {
    case .one:
        print("one")
#if arch(arm64)
    case .two:
        print("two")
#endif
}

Output (unexpected)

enum MyEnum {
    case one
    case two
}

let value = MyEnum.one
switch value {
    case .one:
        print("one")
#if arch(arm64)

    case .two:
        print("two")
#endif
}

Reproduce the issue with rules.yml and test.swift using the reported swiftlint --fix command, then trace the vertical_whitespace_between_cases rule implementation. Compare the expected and unexpected switch output, and confirm the fix no longer inserts a blank line inside the #if guard.