Refactor get_account_id_from_seed / get_from_seed to one common place #3419

Job	Run time
preflight / preflight	44s
preflight / ci-versions	1m 3s
check-runtime-assets	5m 41s
check-runtime-bridge-hubs	8m 40s
check-runtime-collectives	3m 36s
check-runtime-coretime	3m 38s
check-runtime-starters	3m 35s
check-runtime-contracts	2m 56s
check-runtime-testing	3m 51s
All check-runtime-* tests passed	1s
	33m 45s

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