build guest image dynamically #921

Job	Run time
build-for-macos (nightly-2025-05-20)	1m 15s
build-for-macos (nightly)	1m 11s
build-for-other-platforms (nightly-2025-05-20)	36s
clippy (riscv64, nightly)	59s
build-for-other-platforms (nightly)	2m 10s
clippy (x86_64, nightly-2025-05-20)	2m 21s
clippy (x86_64, nightly)	1m 28s
clippy (riscv64, nightly-2025-05-20)	1m 27s
build (riscv64, nightly-2025-05-20)	36s
clippy (aarch64, nightly)	1m 5s
build (riscv64, nightly)	1m 16s
clippy (loongarch64, nightly)	57s
clippy (loongarch64, nightly-2025-05-20)	1m 25s
build (aarch64, nightly-2025-05-20)	40s
build (x86_64, nightly-2025-05-20)	46s
clippy (aarch64, nightly-2025-05-20)	1m 23s
build (loongarch64, nightly)	1m 28s
build (x86_64, nightly)	1m 23s
build (aarch64, nightly)	1m 23s
build (loongarch64, nightly-2025-05-20)	37s
	24m 26s

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