Create action to run Integration test regularly

[ping-ke]

related issue: #308

We need an integration test to check if the latest code can run successfully, and we can set it up as an action to run regularly.

Code change

1. Create a new run-l2-it-rpc.sh and run-l2-it.sh
2. Create an Integration test service that has the same RPC handlers function and receives es-node state and check states

	http.HandleFunc("/hello", HelloHandler)
	http.HandleFunc("/reportstate", ReportStateHandler)

3. Add action integration-test.yml

Check Points

1. Contract can be deployed successfully
2. bootnode can be run successfully
3. Blobs can be uploaded and downloaded to es-node successfully
4. Receive the Hello request within 10 minutes; otherwise, the es-node may be down.
5. Get states updated every 5 minutes; otherwise, the es-node may be down.
6. Sync percentage should increase every state update before it reaches 100%;
7. Get mine state after sync is done;
8. Mined at least one block within 2 hours.
9. Verify data from RPC
10. Verify data from shard manager

The integration test runs on a self-host machine because it needs to run for a long time with a larger storage size which will incur larger charges.
https://github.com/pricing/calculator?feature=actions#actions
https://docs.github.com/zh/billing/managing-billing-for-github-actions/about-billing-for-github-actions#per-minute-rates

[syntrust]

Not sure in this PR but, since we already have an RPC node, should we support the cases of getting blobs (of different blob encoding types) from the API as part of integration tests?

[qzhodl]

Not sure in this PR but, since we already have an RPC node, should we support the cases of getting blobs (of different blob encoding types) from the API as part of integration tests?

@ping-ke do we also want to add a TODO for this

[qzhodl]

LGTM