ci: use fmt-check #687

Job	Run time
Validate Swagger	26s
Clippy	47s
Format	55s
Docker (chain, chain)	2m 51s
Tests	1m 32s
Docker (governance, governance)	3m 55s
Docker (pos, pos)	2m 49s
Docker (rewards, rewards)	3m 36s
Docker (seeder, seeder)	3m 10s
Docker (webserver, webserver)	2m 49s
Docker (parameters, parameters)	2m 33s
Docker (transactions, transactions)	2m 34s
can_enqueue	1s
can_merge	0s
	27m 58s

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