change(scan): Refactor scanning tests #424

Job	Run time
Generate crates matrix	9s
Check crates matrix	2s
Build zebrad crate	35m 12s
Build zebra-utils crate	17m 43s
Build zebra-test crate	1m 34s
Build zebra-state crate	22m 25s
Build zebra-script crate	4m 1s
Build zebra-scan crate	14m 27s
Build zebra-rpc crate	22m 15s
Build zebra-node-services crate	3m 49s
Build zebra-network crate	7m 32s
Build zebra-consensus crate	17m 48s
Build zebra-chain crate	5m 10s
Build tower-fallback crate	1m 6s
Build tower-batch-control crate	12m 48s
Open or update issues for building crates individually failures	0s
	2h 46m 1s

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