fix(wallets): pass contracts via options bag to SimulationOverrides

EmbeddedWallet was still calling the old positional-argument form of the
SimulationOverrides constructor, so contract-instance overrides for the
stub account were silently dropped, and simulation re-entered the real
account entrypoint with no auth witness.

Author: dbanks12

docs/docs-developers/docs/resources/migration_notes.md

@@ -178,6 +178,13 @@ const result = await contract.methods.read_balance(account).simulate({
 
 The same option flows through `wallet.simulateTx` and eventually to `simulatePublicCalls` RPC on `AztecNode`.
 
+Direct callers of the `SimulationOverrides` constructor must switch from a positional `contracts` argument to an options bag:
+
+```diff
+- new SimulationOverrides(contracts);
++ new SimulationOverrides({ contracts });
+```
+
 ### [PXE] `proveTx` takes an options bag
 
 `PXE.proveTx` used to accept `scopes` as a positional argument; it now takes an options bag consistent with `simulateTx` and `profileTx`, and adds an optional `senderForTags` field. Update direct callers:

yarn-project/wallets/src/embedded/embedded_wallet.ts

@@ -264,7 +264,7 @@ export class EmbeddedWallet extends BaseWallet {
     const chainInfo = await this.getChainInfo();
 
     const accountOverrides = await this.buildAccountOverrides(scopes);
-    const overrides = new SimulationOverrides(accountOverrides);
+    const overrides = new SimulationOverrides({ contracts: accountOverrides });
 
     let txRequest: TxExecutionRequest;
     if (from === NO_FROM) {