Try to have new tests support gix-command MSRV of 1.70 #648

Job	Run time
test-journey	3m 54s
cargo-deny	28s
cargo-deny-advisories	32s
check-packetline (ubuntu-latest)	5s
lint	3m 57s
pure-rust-build	2m 1s
test	10m 22s
test-32bit (i386)	5m 48s
test-fast (windows-latest)	12m 41s
test-fixtures-windows	14m 13s
test-32bit (arm32v7)	5m 30s
test-fast (macos-latest)	3m 0s
WebAssembly (wasm32-unknown-unknown)	1m 9s
test-fast (ubuntu-latest)	3m 57s
WebAssembly (wasm32-wasip1)	45s
test-fast (ubuntu-22.04-arm)	6m 14s
check-blocking	3s
Tests pass	1s
	1h 14m 40s

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