Test Mac Catalyst in CI, and clean up unnecessary iOS env flags #1175

Job	Run time
Windows AArch64	1m 0s
Test (ubuntu-24.04, stable)	1m 58s
Test (ubuntu-24.04, beta)	2m 8s
Test (ubuntu-24.04, nightly)	2m 16s
Build Targets (wasm32-unknown-unknown)	17s
Docker (aarch64-unknown-linux-gnu)	38s
Test (macos-latest, stable)	1m 1s
Build Targets (wasm32-wasip1)	16s
Docker (arm-unknown-linux-gnueabihf)	36s
Test (macos-latest, nightly)	1m 16s
Build Targets (x86_64-unknown-fuchsia)	17s
Docker (armv7-unknown-linux-gnueabihf)	37s
Test (windows-latest, stable-x86_64-msvc)	1m 53s
Build Targets (x86_64-fortanix-unknown-sgx)	16s
Docker (i586-unknown-linux-gnu)	39s
iOS (aarch64-apple-ios)	18s
Test (windows-latest, stable-i686-msvc)	2m 12s
Build Targets (x86_64-unknown-illumos)	17s
Docker (i686-unknown-linux-gnu)	34s
Test (windows-latest, stable-x86_64-gnu)	2m 23s
iOS (x86_64-apple-ios)	14s
Docker (powerpc64-unknown-linux-gnu)	38s
Test (windows-latest, nightly-x86_64-msvc)	1m 46s
iOS (aarch64-apple-ios-macabi)	21s
Docker (s390x-unknown-linux-gnu)	46s
Test (windows-latest, nightly-i686-msvc)	2m 9s
Miri	2m 31s
Docker (x86_64-pc-windows-gnu)	33s
Test (windows-latest, nightly-x86_64-gnu)	2m 22s
Docker (x86_64-unknown-linux-gnu)	34s
MSRV (ubuntu-24.04)	14s
Docker (x86_64-unknown-linux-musl)	41s
Rustfmt	4s
MSRV (windows-latest)	28s
Docker (arm-linux-androideabi)	2m 10s
Docker (armv7-linux-androideabi)	1m 34s
Docker (aarch64-linux-android)	1m 26s
Docker (i686-linux-android)	1m 15s
Docker (x86_64-linux-android)	1m 20s
	41m 58s

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