Add voluntary exit via validator manager #19417

Job	Run time
Check for 'skip-ci' label	1s
check-msrv	5m 23s
check-code	13m 26s
target-branch-check	1s
lockbud	13m 52s
release-tests-windows	28m 54s
beacon-chain-tests	25m 46s
debug-tests-ubuntu	9m 44s
network-tests	18m 40s
op-pool-tests	15m 37s
release-tests-ubuntu	22m 16s
slasher-tests	1m 38s
basic-simulator-ubuntu	13m 40s
cargo-udeps	7m 30s
cli-check	6m 46s
compile-with-beta-compiler	14m 42s
ef-tests-ubuntu	12m 22s
execution-engine-integration-ubuntu	13m 20s
fallback-simulator-ubuntu	12m 11s
state-transition-vectors-ubuntu	2m 22s
test-suite-success	8s
	3h 58m 19s

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