re-enable linux arm64 builds #3232

Job	Run time
docs	6m 42s
cargo-deny (advisories)	2m 58s
cargo-deny (bans licenses sources)	2m 57s
build-fuzz	1m 49s
fmt	10s
build-and-test (ubuntu-latest, x86_64-unknown-linux-gnu)	10m 31s
build-and-test (ubuntu-latest, aarch64-unknown-linux-gnu)	8m 39s
build-and-test (macos-latest, x86_64-apple-darwin)	20m 41s
build-and-test (macos-latest, aarch64-apple-darwin)	14m 47s
build-and-test (windows-latest, x86_64-pc-windows-msvc)	20m 49s
rust-analyzer-compat	9m 19s
publish-dry-run	0s
complete	1s
	1h 39m 23s

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