syz-cluster: poll the media tree

Poll the tree and consider it during patch series triage. Note that the
media lists are not monitored as of now, so the tree will only be used
when we receive media patches through other mailing lists.

Author: a-nogikh

syz-cluster/pkg/api/api.go

@@ -243,6 +243,12 @@ var DefaultTrees = []*Tree{
 		Branch:     `mm-new`,
 		EmailLists: []string{`linux-mm@kvack.org`},
 	},
+	{
+		Name:       `media`,
+		URL:        `https://git.linuxtv.org/media.git`,
+		Branch:     `next`,
+		EmailLists: []string{`linux-media@vger.kernel.org`},
+	},
 	{
 		Name:       `torvalds`,
 		URL:        `https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux`,