feat(dcore): Allow to load snapshot from file #2335

Job	Run time
compute-jobs	10s
build-linux / linux lint	1m 19s
build-linux / linux lint-deps	3m 15s
build-linux / linux test-ops	2m 58s
build-linux / linux test-publish	3m 16s
build-linux / linux test	3m 16s
build-linux-arm / linux-arm test	2m 36s
build-linux / linux test-miri	3m 11s
build-linux-arm / linux-arm test-miri	2m 35s
build-linux-arm / linux-arm lint	2m 13s
build-macos / macos lint	1m 54s
build-macos / macos test	3m 19s
build-windows / windows lint	2m 45s
build-windows / windows test	3m 9s
success	1s
	35m 57s

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