Forge clean crashes due to soldeer

[mario-eth]

I have checked the following:

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked that the bug is reproducible with the latest version of Soldeer.

Soldeer Version

latest

What Happened?

Issue was reported on foundry's repo
foundry-rs/foundry#9667

Expected Behavior

No response

Reproduction Steps

No response

Configuration

No response

[beeb]

Some refactor on the foundry side is in order, to avoid duplicating the structs we defined in soldeer-core. Soldeer core has an optional feature flag that enables serde support if needed, which should improve errors on the foundry side I think.