cmd/ore: add akamai garbage collection

Signed-off-by: Mathieu Tortuyaux <mtortuyaux@microsoft.com>

cmd/ore/akamai/gc.go

@@ -0,0 +1,35 @@
+// Copyright The Mantle Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package akamai
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	cmdGC = &cobra.Command{
+		Use:   "gc",
+		Short: "GC resources in Akamai",
+		Long:  `Delete instances and images created over the given duration ago`,
+		RunE:  runGC,
+	}
+
+	gcDuration time.Duration
+)
+
+func init() {
+	Akamai.AddCommand(cmdGC)
+	cmdGC.Flags().DurationVar(&gcDuration, "duration", 5*time.Hour, "how old resources must be before they're considered garbage")
+}
+
+func runGC(cmd *cobra.Command, args []string) error {
+	if err := API.GC(cmd.Context(), gcDuration); err != nil {
+		return fmt.Errorf("running garbage collection: %w", err)
+	}
+
+	return nil
+}