Integration Tests: error handling with publish_storage_deals

[th7nder]

• Logs show wasm:stripped in some places:

2024-07-16 10:43:36.021 ERROR tokio-runtime-worker runtime::market: [Parachain] insane deal: idx 0, error: <wasm:stripped>   

It happens, because:

    #[derive(RuntimeDebug)]
    pub enum ProposalError {
    

So the debug is not implemented in WASM.

 log::error!(target: LOG_TARGET, "insane deal: idx {}, error: {:?}", idx, e);

Possible solutions:

• consolidate everything under error with PalletError

On the other hand...
This error design of publish_storage_deals sucks (#121), from the user perspective.

Originally posted by @th7nder in #108 (comment)

Main goal is to make sure that the final user is able to understand what went wrong without looking into the logs.