Remove CGC from data_availability checker #20368

Job	Run time
Check for 'skip-ci' label	1s
lockbud	14m 53s
check-msrv	5m 14s
check-code	6m 32s
target-branch-check	1s
release-tests-ubuntu	6m 50s
release-tests-windows	14m 26s
op-pool-tests	22m 52s
beacon-chain-tests	1m 41s
basic-simulator-ubuntu	22m 35s
debug-tests-ubuntu	10m 32s
ef-tests-ubuntu	10m 28s
network-tests	23m 53s
slasher-tests	3m 50s
state-transition-vectors-ubuntu	9m 6s
cargo-sort	21s
cargo-udeps	7m 28s
cli-check	15m 22s
compile-with-beta-compiler	15m 47s
execution-engine-integration-ubuntu	11m 14s
fallback-simulator-ubuntu	19m 40s
test-suite-success	0s
	3h 42m 46s

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