Add withhold attack mode for interop #16693

Job	Run time
release-tests-ubuntu	21m 47s
beacon-chain-tests	31m 9s
target-branch-check	1s
basic-simulator-ubuntu	13m 46s
cargo-udeps	6m 38s
check-code	8m 18s
check-msrv	4m 20s
cli-check	8m 50s
compile-with-beta-compiler	13m 50s
debug-tests-ubuntu	5m 22s
dockerfile-ubuntu	14m 21s
doppelganger-protection-test	21m 48s
ef-tests-ubuntu	10m 4s
execution-engine-integration-ubuntu	14m 21s
fallback-simulator-ubuntu	11m 41s
network-tests	12m 0s
op-pool-tests	14m 33s
slasher-tests	1m 22s
state-transition-vectors-ubuntu	2m 37s
test-suite-success	0s
	3h 36m 48s

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