Make `NIOLoopBoundBox` off-EL with sending#3091

natikgadzhi wants to merge 3 commits intoapple:mainapple/swift-nio:mainfrom

natikgadzhi:ng/nioloopbox/make-box-with-sendingnatikgadzhi/swift-nio:ng/nioloopbox/make-box-with-sendingCopy head branch name to clipboard