chore(publicip): refactoring

- Exported `Fetcher` interface
- Inject `Fetcher` to publicip loop and updaters
- Get public IP and information at the same time
- Only query ipinfo.io
- Make `MultiInfo` part of the `Fetch` object

internal/provider/privado/updater/location.go

@@ -3,19 +3,18 @@ package updater
 import (
 	"context"
 	"net"
-	"net/http"
 
 	"github.com/qdm12/gluetun/internal/models"
-	"github.com/qdm12/gluetun/internal/publicip"
+	"github.com/qdm12/gluetun/internal/provider/common"
 )
 
-func setLocationInfo(ctx context.Context, client *http.Client, servers []models.Server) (err error) {
+func setLocationInfo(ctx context.Context, fetcher common.IPFetcher, servers []models.Server) (err error) {
 	// Get public IP address information
 	ipsToGetInfo := make([]net.IP, 0, len(servers))
 	for _, server := range servers {
 		ipsToGetInfo = append(ipsToGetInfo, server.IPs...)
 	}
-	ipsInfo, err := publicip.MultiInfo(ctx, client, ipsToGetInfo)
+	ipsInfo, err := fetcher.FetchMultiInfo(ctx, ipsToGetInfo)
 	if err != nil {
 		return err
 	}