Add builder SSZ flow #19917

Job	Run time
lockbud	14m 14s
Check for 'skip-ci' label	1s
check-code	54s
check-msrv	5m 40s
target-branch-check	1s
cargo-sort	33s
basic-simulator-ubuntu	17m 10s
beacon-chain-tests	23m 0s
cargo-udeps	7m 47s
cli-check	9m 32s
compile-with-beta-compiler	14m 51s
debug-tests-ubuntu	7m 3s
ef-tests-ubuntu	7m 16s
network-tests	23m 15s
fallback-simulator-ubuntu	15m 47s
op-pool-tests	19m 56s
execution-engine-integration-ubuntu	11m 27s
release-tests-ubuntu	21m 11s
release-tests-windows	26m 21s
slasher-tests	3m 46s
state-transition-vectors-ubuntu	4m 30s
test-suite-success	0s
	3h 54m 15s

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