ios: disable ARC #307

Job	Run time
ios	6m 32s
linux - debian:bullseye	2m 37s
macosx	23m 6s
linux - arm32v7/debian:bullseye	15m 44s
android	4m 52s
linux - arm64v8/debian:bullseye	3m 23s
linux - ubuntu:jammy	2m 17s
msvs	3m 38s
linux - igagis/raspbian:bullseye	9m 14s
msys2 - mingw32	3m 14s
msys2 - mingw64	2m 56s
sanitizer - debian:bullseye	2m 40s
sanitizer - arm32v7/debian:bullseye	15m 22s
	1h 35m 35s

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