bug: enable 0 gas price blocks

[apoorvsadana]

SNOS version:

3bd95bf

Current behavior:

Running a block with gas_price 0 panics over here as it expects the price to be > 1.

Expected behavior:

It's possible to have a 0 gas price if

1. The chain is just starting up. The fee token isn't deployed at this point and you need to setup using 0 gas fees. For example, check first tx of Sepolia here.
2. The app chain just wants to run without any fees
3. We don't have a custom fee token like strk so those prices are 0 (will need to check how do V3 txs work here).

Steps to reproduce:

It's a little hacky to do it right now, at least the way I did it

1. Run Madara in devnet
2. Connect pathfinder to this Madara
3. Create blocks with 0 fees
4. Run SNOS

However, once the <10 block issue is fixed maybe we can run it on blocks from 0-5 on Sepolia, it will be easier.

Related code:

snos/crates/rpc-replay/src/block_context.rs

Line 29 in 3bd95bf

eth_l1_gas_price: felt_to_u128(&block.l1_gas_price.price_in_wei).try_into().unwrap(),