corehttp/metrics.go: ERROR with more than one RPC API listener

### Version

```Text
0.17.0-rc1
```

### Config

```json
> ipfs config --json Addresses.API
[
"/ip4/127.0.0.1/tcp/5001",
"/ip6/::1/tcp/5001"
]
```

### Description

```
Daemon is ready
2022-11-10T22:46:26.286Z ERROR core/server corehttp/metrics.go:64 OC default registry ERROR {"error": "cannot register the collector: duplicate metrics collector registration attempted"}
```

A potential fix would be to detect that metrics are already registered, and reuse the existing instance.