Improve weight checker #765

Job	Run time
Task check format	25s
Task check features (runtime/darwinia)	1m 41s
Task check features (runtime/crab)	1m 32s
Task check features (runtime/pangoro)	1m 45s
Task check features (runtime/pangolin)	1m 35s
Task build darwinia	37m 25s
Task test darwinia	46m 42s
Task check EVM	4m 50s
Task check runtimes (darwinia-dev, https://rpc.darwinia-network)	54s
Task check runtimes (crab-dev, https://crab-rpc.darwinia-network)	1m 2s
Task check runtimes (pangoro-dev, https://pangoro-rpc.darwinia.network)	54s
Task check runtimes (pangolin-dev, https://pangolin-rpc.darwinia.network)	52s
Task checks cleaning	3s
	1h 39m 40s

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