feat(forge): More general `MultiContractRunnerBuilder`

[nhtyy]

Component

Forge

Describe the feature you would like

Tracked by #9012, MultiContractRunnerBuilder currently requires the entire output from foundry_compilers as input, however it only ever uses a single field on that type.

The problem with this is library users may be constructing their artifacts by different means and do not want to construct the full type.

I propose changing the input to just take in an ArtifactsContracts<_>

Additional context

No response