chore: enable errcheck linter (#16406)

testutil/sims/simulation_helpers_test.go

@@ -118,6 +118,8 @@ func initTestStores(t *testing.T) (storetypes.KVStore, storetypes.KVStore) {
 	key2 := storetypes.NewKVStoreKey("store2")
 	require.NotPanics(t, func() { ms.MountStoreWithDB(key1, storetypes.StoreTypeIAVL, db) })
 	require.NotPanics(t, func() { ms.MountStoreWithDB(key2, storetypes.StoreTypeIAVL, db) })
-	require.NotPanics(t, func() { ms.LoadLatestVersion() })
+	require.NotPanics(t, func() {
+		_ = ms.LoadLatestVersion()
+	})
 	return ms.GetKVStore(key1), ms.GetKVStore(key2)
 }

testutil/sims/tx_helpers.go

@@ -141,8 +141,8 @@ func SignCheckDeliver(
 		require.False(t, finalizeSuccess)
 	}
 
-	app.Commit()
-
+	_, err = app.Commit()
+	require.NoError(t, err)
 	gInfo := sdk.GasInfo{GasWanted: uint64(txResult.GasWanted), GasUsed: uint64(txResult.GasUsed)}
 	txRes := sdk.Result{Data: txResult.Data, Log: txResult.Log, Events: txResult.Events}
 	if finalizeSuccess {