use shared http client #1273

Job	Run time
Clippy	2m 45s
Validate Swagger	29s
Format	33s
Tests	4m 0s
Docker (pos, pos)	16m 47s
Docker (governance, governance)	19m 34s
Docker (rewards, rewards)	18m 10s
Docker (seeder, seeder)	16m 32s
Docker (parameters, parameters)	19m 29s
Docker (webserver, webserver)	17m 3s
Docker (chain, chain)	19m 55s
Docker (transactions, transactions)	19m 21s
can_enqueue	2s
can_merge	0s
	2h 34m 40s

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