Add voluntary exit via validator manager #19473

Job	Run time
Check for 'skip-ci' label	1s
check-code	45s
check-msrv	5m 13s
lockbud	13m 40s
target-branch-check	1s
beacon-chain-tests	21m 27s
release-tests-windows	31m 48s
debug-tests-ubuntu	11m 11s
network-tests	20m 19s
op-pool-tests	17m 8s
release-tests-ubuntu	19m 45s
slasher-tests	3m 31s
state-transition-vectors-ubuntu	3m 53s
cargo-sort	37s
basic-simulator-ubuntu	16m 28s
cargo-udeps	7m 26s
cli-check	8m 37s
compile-with-beta-compiler	15m 35s
ef-tests-ubuntu	12m 36s
execution-engine-integration-ubuntu	11m 14s
fallback-simulator-ubuntu	14m 15s
test-suite-success	0s
	3h 55m 30s

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