Not supported chain id 2345

Nobody has claimed this yet.

### What is this about?

When we use `"https://gas.api.cx.metamask.io/networks/2345/suggestedGasFees"` for [GOAT Network](explorer.goat.network) to get the estimated gas, it responds:

```
{
"statusCode": 400,
"message": "'2345' is not a supported chain id."
}
```

We have listed GOAT on chainlist at [https://chainlist.org/chain/2345](https://chainlist.org/chain/2345).

### Scenario

When the user add GOAT Network into their metamask, but Metamask can not get the correct gas for their transaction.

### Design

_No response_

### Technical Details

We dived into the issue and found that `https://gas.api.cx.metamask.io/networks/2345/suggestedGasFees` doesn't work. and from this comment (https://github.com/MetaMask/metamask-extension/issues/25655#issuecomment-2270524318), it says `suggestedGasFees` doesn't use the chain's `eth_estimateGas`.

**We need to use our own `eth_estimateGas` because GOAT Network is a Bitcoin L2, and the gas token is wrapped BTC**.
GOAT Network:
* Explorer: [explorer.goat.network](explorer.goat.network)
* RPC: [rpc.goat.network](rpc.goat.network)

### Threat Modeling Framework

_No response_

### Acceptance Criteria

_No response_

### Stakeholder review needed before the work gets merged

- [x] Engineering (needed in most cases)
- [ ] Design
- [ ] Product
- [ ] QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
- [ ] Security
- [ ] Legal
- [ ] Marketing
- [ ] Management (please specify)
- [ ] Other (please specify)

### References

_No response_

Start by tracing the MetaMask gas-estimation path that calls https://gas.api.cx.metamask.io/networks/2345/suggestedGasFees, then compare it with the GOAT Network RPC at https://rpc.goat.network. Done means GOAT Network chain ID 2345 can receive a correct gas estimate using its own eth_estimateGas behavior, including its wrapped BTC gas token.

Written by the indexing model from the issue text.