XCTUnwrap should be added to default --autoclosures list

[nicklockwood]

This can also happen with just try and no await -- SwiftFormat removes the second try from this:

/// Try to cast the object to the given type, and throw if it fails (`as?` + `XCTUnwrap`).
func XCTCast<TSource, TTarget>(
    _ expression: @autoclosure () throws -> TSource,
    _: TTarget.Type = TTarget.self,
    _ message: String = "",
    file: StaticString = #file,
    line: UInt = #line
) throws -> TTarget {
    try XCTUnwrap(try expression() as? TTarget, message, file: file, line: line)
}

Originally posted by @bbrk24 in #1478