Builder and beacon API updates for Sidecar inclusion proofs #219

Job	Run time
check-code	8m 2s
beacon-chain-tests	40m 21s
cargo-udeps	6m 28s
check-msrv	8m 16s
compile-with-beta-compiler	7m 34s
debug-tests-ubuntu	20m 55s
dockerfile-ubuntu	15m 11s
doppelganger-protection-test	30m 3s
ef-tests-ubuntu	32m 49s
eth1-simulator-ubuntu	21m 27s
execution-engine-integration-ubuntu	15m 14s
merge-transition-ubuntu	22m 12s
network-tests	14m 13s
no-eth1-simulator-ubuntu	22m 7s
op-pool-tests	17m 30s
release-tests-ubuntu	41m 50s
release-tests-windows	1h 20m 6s
slasher-tests	6m 43s
state-transition-vectors-ubuntu	8m 42s
syncing-simulator-ubuntu	16m 36s
target-branch-check	1s
	7h 16m 20s

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