darwin,test: squelch EBUSY error on multicast join #7

Job	Run time
build-linux	1m 33s
build-android	6m 22s
build-cross-qemu-arm	1m 33s
build-macos (macos-13)	3m 5s
build-cross-qemu-armhf	1m 35s
build-ios (macos-13)	1m 37s
build-cross-qemu-aarch64	1m 39s
build-macos (macos-14)	2m 21s
build-ios (macos-14)	1m 38s
build-cross-qemu-riscv64	1m 39s
build-cross-qemu-ppc	1m 36s
build-cross-qemu-ppc64	1m 40s
build-cross-qemu-ppc64le	1m 37s
build-cross-qemu-s390x	1m 36s
build-cross-qemu-mips	1m 40s
build-cross-qemu-mips64	1m 50s
build-cross-qemu-mipsel	1m 54s
build-cross-qemu-mips64el	1m 44s
build-cross-qemu-arm (u64 slots)	1m 37s
build-cross-qemu-aarch64 (u64 slots)	1m 39s
build-cross-qemu-ppc (u64 slots)	1m 38s
build-cross-qemu-ppc64 (u64 slots)	2m 7s
	43m 40s

Provide feedback