dbgutil: automatically switch to the kernel if booting from preboot #27

Job	Run time
build-limine-x86_64 (dev, --all-features)	52s
build-limine-aarch64 (dev, --all-features)	53s
build-kernel-x86_64 (dev, --all-features)	51s
build-limine-x86_64 (dev, --no-default-features)	54s
build-limine-aarch64 (dev, --no-default-features)	48s
build-kernel-aarch64 (dev, --all-features)	50s
build-limine-x86_64 (release, --all-features)	54s
build-kernel-x86_64 (dev, --no-default-features)	51s
build-kernel-aarch64 (dev, --no-default-features)	50s
build-limine-aarch64 (release, --all-features)	50s
build-limine-x86_64 (release, --no-default-features)	54s
build-kernel-x86_64 (release, --all-features)	54s
build-limine-aarch64 (release, --no-default-features)	53s
build-kernel-aarch64 (release, --all-features)	51s
build-kernel-x86_64 (release, --no-default-features)	52s
build-kernel-aarch64 (release, --no-default-features)	50s
lint-clippy	57s
lint-docs	1m 4s
lint-python	8s
lint-rustfmt	42s
unit-test	41s
	17m 19s

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