[mt-batcher]: Querying gasPrice without timeout judgment can cause the program to wait continuously

[agnarsong]

Describe the bug
Querying gasPrice without timeout judgment can cause the program to wait continuously

To Reproduce
Steps to reproduce the behavior:

1. Modify a testcase in mantle/mt-batcher/txmgr/txmgr_test.go
2. modified code:

func TestTxMgrConfirmAtMinGasPrice(t *testing.T) {
	t.Parallel()

	h := newTestHarness()

	gasPricer := newGasPricer(1)

	updateGasPrice := func(ctx context.Context) (*types.Transaction, error) {
		gasTipCap, gasFeeCap := gasPricer.sample()
		for i := 0; i <= 3; i++ {
			fmt.Printf("sleep %v \n", i+1)
			time.Sleep(60 * time.Second)
		}
		return types.NewTx(&types.DynamicFeeTx{
			GasTipCap: gasTipCap,
			GasFeeCap: gasFeeCap,
		}), nil
	}
.
.
.

3. run this testcae

go test -run TestTxMgrConfirmAtMinGasPrice txmgr/txmgr_test.go -v

Expected behavior
go test -run TestTxMgrConfirmAtMinGasPrice txmgr/txmgr_test.go -v

Screenshots

(anaconda3)➜  mt-batcher git:(develop) ✗ go test -run TestTxMgrConfirmAtMinGasPrice txmgr/txmgr_test.go -v
=== RUN   TestTxMgrConfirmAtMinGasPrice
=== PAUSE TestTxMgrConfirmAtMinGasPrice
=== CONT  TestTxMgrConfirmAtMinGasPrice
sleep 1 
sleep 2
sleep 3
sleep 4
--- PASS: TestTxMgrConfirmAtMinGasPrice (480.00s)
PASS
ok      command-line-arguments  480.142s