nydusify: refactor check subcommand #3461

Job	Run time
contrib-unit-test-coverage	1m 18s
contrib-build (amd64)	35s
contrib-lint (contrib/nydusify)	59s
contrib-build (arm64)	45s
nydus-build (amd64)	2m 9s
contrib-lint (contrib/nydus-overlayfs)	27s
cargo-deny	49s
contrib-build (ppc64le)	39s
nydus-build (arm64)	2m 8s
contrib-build (riscv64)	40s
nydus-build (ppc64le)	2m 3s
nydus-build (riscv64)	1m 56s
nydusd-build-macos (amd64)	39s
nydus-unit-test	4m 43s
nydusd-build-macos (arm64)	42s
nydus-unit-test-coverage	3m 38s
takeover-test	2m 4s
nydus-integration-test	9m 46s
performance-test (fs-version-5)	1m 52s
performance-test (fs-version-6)	1m 54s
performance-test (zran)	1m 50s
upload-coverage-to-codecov	9s
	41m 45s

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