Remove the `test-32bit-cross` job #569

Job	Run time
cargo-deny	27s
cargo-deny-advisories	29s
check-blocking	3s
check-packetline (ubuntu-latest)	6s
pure-rust-build	2m 2s
lint	3m 47s
test	10m 19s
test-32bit (i386)	5m 33s
test-fast (windows-latest)	14m 35s
test-32bit (arm32v7)	7m 24s
test-fast (macos-latest)	2m 56s
test-fast (ubuntu-latest)	3m 41s
test-fixtures-windows	14m 49s
test-journey	3m 52s
test-fast (ubuntu-24.04-arm)	4m 1s
WebAssembly (wasm32-unknown-unknown)	1m 6s
WebAssembly (wasm32-wasip1)	42s
Tests pass	1s
	1h 15m 53s

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