Apply metrics in core/statedb

[trinhdn2]

Prerequisite

• Refactor metrics package with Prometheus and InfluxDB support #428

Checklist

• Add expensive metrics to track account and storage updating/deleting

Added metrics:

• state_delete_account
• state_delete_storage
• state_update_account
• state_update_storage

Example of new metrics under prometheus format:

# TYPE state_delete_account gauge
state_delete_account 3

# TYPE state_delete_storage gauge
state_delete_storage 195635

# TYPE state_update_account gauge
state_update_account 1568609

# TYPE state_update_storage gauge
state_update_storage 1623327

References:

• core: split out detailed trie access metrics from insertion time ethereum/go-ethereum#19316
• core, light, tests, trie: add state metrics ethereum/go-ethereum#23433