Enable shell-related and env var tests Windows already supports #5627

Job	Run time
cargo-deny	29s
cargo-deny-advisories	27s
check-packetline (ubuntu-latest)	6s
check-blocking	3s
lint	3m 46s
pure-rust-build	2m 11s
test	10m 32s
test-32bit (i386)	5m 57s
test-fast (windows-latest)	16m 2s
test-32bit (arm32v7)	5m 38s
test-fast (macos-latest)	3m 49s
test-fast (ubuntu-latest)	3m 46s
test-fast (ubuntu-22.04-arm)	6m 1s
test-fixtures-windows	15m 32s
test-journey	4m 11s
WebAssembly (wasm32-unknown-unknown)	1m 10s
WebAssembly (wasm32-wasip1)	38s
Tests pass	1s
	1h 20m 19s

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