refactor(lib/sync): introduce `fullsync` strategy #8987

Job	Run time
integration-tests (github.com/ChainSafe/gossamer/dot)	2m 31s
integration-tests (github.com/ChainSafe/gossamer/dot)	2m 9s
integration-tests (github.com/ChainSafe/gossamer/dot/core)	1m 56s
integration-tests (github.com/ChainSafe/gossamer/dot/core)	1m 24s
integration-tests (github.com/ChainSafe/gossamer/dot/rpc)	1m 28s
integration-tests (github.com/ChainSafe/gossamer/dot/rpc)	1m 25s
integration-tests (github.com/ChainSafe/gossamer/dot/rpc/modules)	3m 18s
integration-tests (github.com/ChainSafe/gossamer/dot/rpc/modules)	3m 10s
integration-tests (github.com/ChainSafe/gossamer/dot/rpc/subscription)	1m 46s
integration-tests (github.com/ChainSafe/gossamer/dot/rpc/subscription)	1m 53s
integration-tests (github.com/ChainSafe/gossamer/dot/state)	1m 12s
integration-tests (github.com/ChainSafe/gossamer/dot/state)	1m 16s
integration-tests (github.com/ChainSafe/gossamer/dot/digest)	1m 4s
integration-tests (github.com/ChainSafe/gossamer/dot/digest)	1m 5s
integration-tests (github.com/ChainSafe/gossamer/dot/network)	2m 39s
integration-tests (github.com/ChainSafe/gossamer/dot/network)	2m 23s
integration-tests (github.com/ChainSafe/gossamer/dot/sync)	1m 9s
integration-tests (github.com/ChainSafe/gossamer/dot/sync)	1m 6s
integration-tests (github.com/ChainSafe/gossamer/lib/babe)	4m 22s
integration-tests (github.com/ChainSafe/gossamer/lib/babe)	4m 26s
integration-tests (github.com/ChainSafe/gossamer/lib/grandpa)	1m 31s
integration-tests (github.com/ChainSafe/gossamer/lib/grandpa)	1m 27s
	44m 40s

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