chore: fix pass metadata requests

exporter/prometheusremotewriteexporter/exporter.go

@@ -142,7 +142,7 @@ func (prwe *prwExporter) PushMetrics(ctx context.Context, md pmetric.Metrics) er
 			m = prometheusremotewrite.OtelMetricsToMetadata(md, prwe.exporterSettings.AddMetricSuffixes)
 		}
 		// Call export even if a conversion error, since there may be points that were successfully converted.
-		return multierr.Combine(err, prwe.handleExport(ctx, tsMap, nil))
+		return multierr.Combine(err, prwe.handleExport(ctx, tsMap, m))
 	}
 }