merge queue: embarking unstable (21cabba) and #8647 together #17990

Job	Run time
dockerfile-ubuntu	8m 24s
doppelganger-protection-success-test	12m 19s
run-local-testnet	28m 0s
doppelganger-protection-failure-test	7m 16s
genesis-sync-test-electra-120s	4m 47s
genesis-sync-test-electra-300s	8m 41s
genesis-sync-test-fulu-300s	8m 10s
genesis-sync-test-fulu-120s	5m 27s
checkpoint-sync-test-${{ matrix.network }}	0s
local-testnet-success	7s
	1h 23m 11s

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