Fix subscribing to attestation subnets for aggregating (#6681) #19326

Job	Run time
Check for 'skip-ci' label	1s
check-code	9m 8s
lockbud	14m 17s
target-branch-check	1s
check-msrv	5m 15s
basic-simulator-ubuntu	21m 49s
cli-check	15m 6s
cargo-udeps	7m 26s
beacon-chain-tests	33m 32s
compile-with-beta-compiler	14m 21s
debug-tests-ubuntu	7m 52s
ef-tests-ubuntu	7m 40s
execution-engine-integration-ubuntu	15m 42s
fallback-simulator-ubuntu	19m 31s
network-tests	25m 34s
op-pool-tests	22m 51s
release-tests-ubuntu	24m 53s
release-tests-windows	33m 16s
slasher-tests	3m 37s
state-transition-vectors-ubuntu	9m 35s
test-suite-success	1s
	4h 51m 28s

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