aarch64: lock step secondary execution signaling #91

Job	Run time
build-kernel-x86_64 (dev, --all-features)	1m 29s
build-kernel-aarch64 (dev, --all-features)	56s
build-limine-aarch64 (dev, --all-features)	1m 4s
build-kernel-x86_64 (dev, --no-default-features)	1m 5s
boot-protocol-header	53s
build-kernel-aarch64 (dev, --no-default-features)	56s
build-limine-aarch64 (dev, --no-default-features)	52s
build-kernel-x86_64 (release, --all-features)	1m 0s
build-kernel-aarch64 (release, --all-features)	55s
build-limine-aarch64 (release, --all-features)	53s
build-limine-x86_64 (dev, --all-features)	1m 11s
build-kernel-aarch64 (release, --no-default-features)	56s
build-kernel-x86_64 (release, --no-default-features)	1m 1s
build-limine-aarch64 (release, --no-default-features)	55s
build-limine-x86_64 (dev, --no-default-features)	1m 6s
build-limine-x86_64 (release, --all-features)	1m 1s
lint-clippy	1m 20s
lint-docs	1m 33s
build-limine-x86_64 (release, --no-default-features)	1m 1s
lint-python	9s
lint-rustfmt	42s
unit-test	57s
	21m 55s

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