Electra spec changes for `v1.5.0-alpha.10` #11950

Job	Run time
dockerfile-ubuntu	5m 47s
run-local-testnet	4m 39s
doppelganger-protection-success-test	11m 40s
doppelganger-protection-failure-test	6m 39s
local-testnet-success	4s
	28m 49s

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