[tfchain val] create snapshot compose stack

[coesensbert]

threefoldtech/tfchain#981

To lower storage requirements for tfchain validators we added new pruning flags. However this requires separate snapshot creation since pruning here is different from public RPC nodes.

• devnet
• qanet
• testnet
• mainnet

[sameh-farouk]

@sabrinasadik @coesensbert I suggest running these snapshots on one of the boot nodes for each network to avoid the cost of renting or dedicating new servers. Boot nodes typically use the same pruning flags as the validators and are primarily focused on syncing with the libp2p network with minimal additional work. Leveraging these servers for more tasks would be both practical and cost-effective.

[coesensbert]

Thanks @sameh-farouk for the suggestion, we will look into it