ci: Install gcc-aarch64-linux-gnu for gnd cross-compilation (#6449) #11436

Job	Run time
Build in release mode	1m 17s
Clippy linting	1m 45s
Check rustfmt style	15s
Run unit tests	3m 52s
Run integration tests	4m 31s
Subgraph Runner integration tests	3m 4s
	14m 44s

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