Added account server useful for storage of provisioned accounts #1691

Job	Run time
ERC20 processor build only	2m 39s
Build and cache all tests (release-fast)	2m 21s
Payment lib unit test run	1m 37s
Fmt and clippy	1m 15s
Build and cache all tests (release-lto)	3m 10s
Payment tests (basic + multi)	2m 48s
Build and cache all tests (dev)	1m 33s
Payment tests (errors)	3m 42s
Payment tests (custom)	4m 58s
Payment tests (multi)	3m 6s
Payment tests (rpc pool)	2m 20s
Test Holesky faucet	2m 45s
	32m 14s

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