change(scan): Refactor scanning tests #417

Job	Run time
Generate crates matrix	9s
Check crates matrix	5s
Build zebrad crate	34m 58s
Build zebra-utils crate	16m 35s
Build zebra-test crate	1m 34s
Build zebra-state crate	23m 41s
Build zebra-script crate	4m 31s
Build zebra-scan crate	14m 6s
Build zebra-rpc crate	22m 52s
Build zebra-node-services crate	4m 3s
Build zebra-network crate	7m 37s
Build zebra-consensus crate	17m 42s
Build zebra-chain crate	5m 46s
Build tower-fallback crate	1m 2s
Build tower-batch-control crate	13m 11s
Open or update issues for building crates individually failures	0s
	2h 47m 52s

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