Support Multi-Node Setup for Certain Precompile E2E Tests

Some precompile modules require a multi-node environment to be properly tested. In particular:
- The **Slashing module** requires at least two validator nodes with different voting powers to simulate jail and unjail flows.
- The **ICS20 module** requires a live IBC connection, which can only be tested by running a separate IBC-compatible chain alongside the evmd chain.

These tests cannot be executed in a single-node setup, so we should track them separately and implement them once the proper infrastructure is available.