TestBridging: Use XCTUnwrap instead of force-unwrap
TestBridging: Use XCTUnwrap instead of force-unwrap

- This test crashes on macOS so make the test soft fail until it is
  fixed properly.

apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation