geth: add new update transitions helper utility #1114

Job	Run time
Build Docker image	1m 42s
Code linters	2m 15s
Unit tests in ubuntu-20.04	20m 17s
Run PEEPS tests	8m 29s
Acceptance tests (basic \|\| basic-raft \|\| (advanced && raft) \|\| networks/typical::raft)	19m 30s
Acceptance tests (basic \|\| basic-istanbul \|\| (advanced && istanbul && !block-heights) \|\| networks/typical::istanbul)	21m 48s
Acceptance tests (basic \|\| basic-istanbul \|\| (advanced && istanbul && !block-heights) \|\| empty-block-period \|\| block-reward \|\| networks/typical::qbft)	20m 52s
Acceptance tests (validator-management && networks/template::istanbul-3plus1)	7m 41s
Acceptance tests (validator-management && networks/template::qbft-3plus1)	7m 48s
Acceptance tests (multitenancy && networks/plugins::raft-multitenancy)	28s
Acceptance tests (migration && networks/template::istanbul-4nodes)	5m 16s
Acceptance tests (migration && networks/template::raft-4nodes)	4m 51s
Acceptance tests (basic \|\| networks/typical::raftmps)	16m 19s
Acceptance tests (basic \|\| networks/typical::istanbulmps)	21m 23s
Acceptance tests (basic \|\| networks/typical::qbftmps)	20m 38s
	2h 59m 17s

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