ci: use fmt-check #689

Job	Run time
Tests	1m 19s
Validate Swagger	31s
Clippy	43s
Docker (chain, chain)	2m 51s
Format	21s
Docker (governance, governance)	3m 37s
Docker (pos, pos)	3m 32s
Docker (rewards, rewards)	3m 24s
Docker (seeder, seeder)	4m 27s
Docker (webserver, webserver)	2m 52s
Docker (parameters, parameters)	3m 20s
Docker (transactions, transactions)	2m 45s
can_enqueue	1s
can_merge	0s
	29m 43s

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