Move off macos-12 #187

Job	Run time
Test Suite (stable)	6m 38s
Test Suite (beta)	6m 37s
Rustfmt	2m 42s
Bench (current, refs/pull/186/merge)	6m 13s
Test Suite (1.70.0)	7m 16s
Builds (ubuntu-22.04, aarch64-linux-android)	1m 49s
Bench (base, main)	4m 54s
Builds (ubuntu-22.04, x86_64-unknown-linux-musl)	1m 44s
Builds (ubuntu-22.04, wasm32-unknown-unknown, --features wasm --no-default-features)	3m 37s
Builds (macos-13, aarch64-apple-ios)	2m 50s
Builds (macos-13, x86_64-apple-darwin)	4m 53s
Builds (macos-14, aarch64-apple-darwin)	3m 44s
Builds (windows-2019, x86_64-pc-windows-msvc)	8m 11s
Upload benchmark results	3m 14s
	1h 4m 22s

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