Add voluntary exit via validator manager #19415

Job	Run time
check-code	13m 38s
Check for 'skip-ci' label	1s
check-msrv	5m 16s
lockbud	13m 36s
target-branch-check	1s
release-tests-ubuntu	27m 54s
network-tests	18m 45s
beacon-chain-tests	27m 55s
release-tests-windows	27m 37s
op-pool-tests	16m 2s
slasher-tests	1m 52s
basic-simulator-ubuntu	14m 1s
cargo-udeps	7m 19s
cli-check	7m 37s
compile-with-beta-compiler	15m 8s
ef-tests-ubuntu	7m 30s
execution-engine-integration-ubuntu	13m 47s
debug-tests-ubuntu	10m 21s
fallback-simulator-ubuntu	11m 1s
state-transition-vectors-ubuntu	2m 26s
test-suite-success	1s
	4h 1m 48s

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