feat: support takeover for fscache #96

Job	Run time
nydus-build	4m 17s
contrib-build-master	0s
contrib-build	2m 42s
nydus-build-master	0s
cargo-deny	2m 47s
nydusd-build-macos (amd64)	5m 1s
nydus-unit-test	5m 53s
nydus-unit-test-coverage	7m 36s
nydusd-build-macos (arm64)	5m 3s
benchmark-nydus-all-prefetch-master	0s
benchmark-nydus-filelist-prefetch-master	0s
benchmark-nydus-no-prefetch-master	0s
benchmark-zran-all-prefetch-master	0s
benchmark-zran-no-prefetch-master	0s
benchmark-nydus-filelist-prefetch	2m 44s
benchmark-oci	1m 4s
benchmark-nydus-all-prefetch	53s
benchmark-nydus-no-prefetch	38s
benchmark-zran-all-prefetch	1m 9s
benchmark-zran-no-prefetch	55s
nydus-integration-test	5m 9s
benchmark-result	17s
benchmark-compare	0s
	46m 8s

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