chore: refactor metrics endpoint

refactoring is needed to make the metrics package usable from within the
runner package for further metrics.

This change also makes the metric-collector independent from requests to
the /metrics endpoint

Signed-off-by: Mario Constanti <mario.constanti@mercedes-benz.com>

runner/metrics/repository.go

@@ -0,0 +1,35 @@
+package metrics
+
+import (
+	"context"
+	"strconv"
+
+	"github.com/cloudbase/garm/metrics"
+	"github.com/cloudbase/garm/runner"
+)
+
+func CollectRepositoryMetric(ctx context.Context, r *runner.Runner) error {
+
+	// reset metrics
+	metrics.EnterpriseInfo.Reset()
+	metrics.EnterprisePoolManagerStatus.Reset()
+
+	repositories, err := r.ListRepositories(ctx)
+	if err != nil {
+		return err
+	}
+
+	for _, repository := range repositories {
+		metrics.EnterpriseInfo.WithLabelValues(
+			repository.Name, // label: name
+			repository.ID,   // label: id
+		).Set(1)
+
+		metrics.EnterprisePoolManagerStatus.WithLabelValues(
+			repository.Name, // label: name
+			repository.ID,   // label: id
+			strconv.FormatBool(repository.PoolManagerStatus.IsRunning), // label: running
+		).Set(metrics.Bool2float64(repository.PoolManagerStatus.IsRunning))
+	}
+	return nil
+}