[DIR_METADATA] Migrate from Monorail to Buganizer.

Bug: none
Change-Id: I6889f64ee04675b3da2c7f4c576d407cdb03d4d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/6935512
Reviewed-by: Brian Ryner <bryner@google.com>
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Brian Ryner <bryner@google.com>

DIR_METADATA

@@ -1,3 +1,3 @@
-monorail: {
-  component: "Infra>SDK"
+buganizer_public: {
+  component_id: 1456102
 }