[DA] full node shouldn't create Avail App ID

[artemijspavlovs]

from:

#1321 (comment)

we should take into account that full-node does not need to create appid, just load from existing state update or using avail service in case not avail state update yet.

[anhductn2001]

This function will return the AppID if it has been generated for rollappID

roller/data_layer/avail/appid.go

Line 33 in 6a202fc

tx := api.Tx.DataAvailability.CreateApplicationKey([]byte(rollappID))