downloadCargoPackageFromGit: set fetchLFS when an output hash is defi… #1197

Job	Run time
check-dead-code	30s
examples-linux (alt-registry)	1m 7s
check-fmt	23s
examples-linux (build-std)	1m 3s
examples-darwin	2m 44s
tests (https://releases.nixos.org/nix/nix-2.18.2/install)	1m 33s
examples-linux (cross-musl)	1m 5s
tests (https://releases.nixos.org/nix/nix-2.18.2/install, --override-input nixpkgs $(./ci/ref-fro...	2m 24s
examples-linux (cross-rust-overlay)	1m 5s
examples-linux (cross-windows)	1m 7s
examples-linux (custom-toolchain)	1m 7s
examples-linux (end-to-end-testing)	1m 7s
examples-linux (quick-start)	1m 4s
examples-linux (quick-start-simple)	1m 2s
examples-linux (quick-start-workspace)	1m 5s
examples-linux (sqlx)	1m 3s
examples-linux (trunk-workspace)	1m 8s
examples-linux (trunk)	1m 11s
all systems go	0s
	21m 48s

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