Upgrade llvm 18 zig 13 #2592

Job	Run time
check-changes	18s
ran-none	0s
start-nix-linux-aarch64-cargo-build-test / nix-linux-arm64	17m 46s
start-macos-x86-64-tests / test-rust-macos-x86-64	17m 48s
start-nix-linux-aarch64-build-default-test / nix-linux-arm64	4m 35s
start-nix-linux-x86-64-tests / nix-linux-x86	8m 41s
start-nix-macos-apple-silicon-tests / nix-apple-silicon	7m 10s
start-panic-check / improve panics	7m 40s
start-roc-benchmarks / benchmark roc programs	8m 31s
start-ubuntu-x86-64-nix-tests-debug / cargo test debug nix	17m 41s
start-ubuntu-x86-64-tests / test zig, rust, wasm...	34s
start-windows-release-build-test / windows-release-build	13m 10s
start-windows-tests / windows-test-subset	17m 26s
ran-full	1s
finish	1s
	2h 1m 22s

Provide feedback