unsafe-block test case and detector #49

Job	Run time
Check config (ubuntu-latest)	5s
Check config (macos-latest)	17s
Build (ubuntu-latest)	4m 20s
Build (macos-latest)	6m 28s
Test (ubuntu-latest, avoid-core-mem-forget)	2m 22s
Test (ubuntu-latest, avoid-unsafe-block)	2m 19s
Test (ubuntu-latest, divide-before-multiply)	4m 47s
Test (ubuntu-latest, insufficiently-random-values)	2m 23s
Test (ubuntu-latest, overflow-check)	2m 22s
Test (ubuntu-latest, unprotected-update-current-contract-wasm)	2m 28s
Test (ubuntu-latest, unsafe-expect)	2m 13s
Test (ubuntu-latest, unsafe-unwrap)	2m 19s
Test (macos-latest, avoid-core-mem-forget)	10m 18s
Test (macos-latest, avoid-unsafe-block)	8m 43s
Test (macos-latest, divide-before-multiply)	15m 6s
Test (macos-latest, insufficiently-random-values)	8m 42s
Test (macos-latest, overflow-check)	8m 3s
Test (macos-latest, unprotected-update-current-contract-wasm)	6m 43s
Test (macos-latest, unsafe-expect)	12m 28s
Test (macos-latest, unsafe-unwrap)	10m 28s
	1h 52m 54s

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