fix errors when creating tx in safe v1.0.0

- Code was expecting `ExecutionSuccess` event. That's not part of v1.0.0
- `transactionHash` is part of the tx receipt, so no need to extract it from the event
- `safeTxHash` is calculated client-side, so no longer needed to get it from tx receipt

src/routes/safe/store/actions/createTransaction.ts

@@ -219,8 +219,7 @@ const createTransaction = ({
         const toStoreTx = isExecution
           ? mockedTx.withMutations((record) => {
               record
-                .set('executionTxHash', receipt.events.ExecutionSuccess.transactionHash)
-                .set('safeTxHash', receipt.events.ExecutionSuccess.returnValues.txHash)
+                .set('executionTxHash', receipt.transactionHash)
                 .set('executor', from)
                 .set('isExecuted', true)
                 .set('isSuccessful', receipt.status)

src/routes/safe/store/actions/processTransaction.ts

@@ -157,8 +157,7 @@ const processTransaction = ({
         const toStoreTx = isExecution
           ? mockedTx.withMutations((record) => {
               record
-                .set('executionTxHash', receipt.events.ExecutionSuccess.transactionHash)
-                .set('safeTxHash', receipt.events.ExecutionSuccess.returnValues.txHash)
+                .set('executionTxHash', receipt.transactionHash)
                 .set('blockNumber', receipt.blockNumber)
                 .set('executionDate', record.submissionDate)
                 .set('executor', from)