op-e2e: bump a couple timeouts slightly

This increases two timeouts which have proved problematic locally and
have caused flakes.  Because these are timeouts, and not sleeps, this
should have no impact for successful test execution on other systems.

op-e2e/bridge_test.go

@@ -76,7 +76,7 @@ func TestERC20BridgeDeposits(t *testing.T) {
 	// Approve WETH9 with the bridge
 	tx, err = WETH9.Approve(opts, predeploys.DevL1StandardBridgeAddr, new(big.Int).SetUint64(math.MaxUint64))
 	require.NoError(t, err)
-	_, err = waitForTransaction(tx.Hash(), l1Client, 3*time.Duration(cfg.DeployConfig.L1BlockTime)*time.Second)
+	_, err = waitForTransaction(tx.Hash(), l1Client, 6*time.Duration(cfg.DeployConfig.L1BlockTime)*time.Second)
 	require.NoError(t, err)
 
 	// Bridge the WETH9

op-e2e/system_test.go

@@ -1279,7 +1279,7 @@ func TestStopStartBatcher(t *testing.T) {
 	receipt := sendTx()
 
 	// wait until the block the tx was first included in shows up in the safe chain on the verifier
-	safeBlockInclusionDuration := time.Duration(3*cfg.DeployConfig.L1BlockTime) * time.Second
+	safeBlockInclusionDuration := time.Duration(6*cfg.DeployConfig.L1BlockTime) * time.Second
 	_, err = waitForBlock(receipt.BlockNumber, l2Verif, safeBlockInclusionDuration)
 	require.Nil(t, err, "Waiting for block on verifier")