change blsagg_test to use AdvanceChainByNBlocksExecInContainer fct wh…

…ich doesn't need cast to be installed locally

services/bls_aggregation/blsagg_test.go

@@ -839,7 +839,7 @@ func TestIntegrationBlsAgg(t *testing.T) {
 			blsKeyPair, quorumNumbers, "socket",
 		)
 		require.NoError(t, err)
-		testutils.AdvanceChainByNBlocks(1, anvilHttpEndpoint)
+		testutils.AdvanceChainByNBlocksExecInContainer(context.TODO(), 1, anvilC)
 
 		curBlockNum, err = ethHttpClient.BlockNumber(context.Background())
 		referenceBlockNumber := uint32(curBlockNum) - 1

testutils/anvil.go

@@ -133,7 +133,7 @@ func AdvanceChainByNBlocks(n int, anvilEndpoint string) {
 	}
 }
 
-// AdvanceChainByNBlocks requires cast to be installed on the host machine, whereas this one doesn't.
+// Prefer this function over AdvanceChainByNBlocks b/c it doesn't require cast to be installed on the host machine, whereas this one doesn't.
 func AdvanceChainByNBlocksExecInContainer(ctx context.Context, n int, anvilC testcontainers.Container) {
 	c, _, err := anvilC.Exec(ctx, []string{"cast", "rpc", "anvil_mine", fmt.Sprintf("%d", n), "--rpc-url", "http://localhost:8545"})
 	if err != nil {