Counter metric name should adhere to `*_total` pattern

[shekhirin]

Describe the feature

We have a bunch of Counter metrics that do not adhere to the recommended pattern: https://github.com/search?q=repo:paradigmxyz/reth+/.*:+Counter/+NOT+total&type=code.

We need to rename these metrics, so that they have the suffix _total and update the Grafana dashboards accordingly.

Additional context

No response

### Tasks
- [ ] https://github.com/paradigmxyz/reth/pull/8149/