[buganizer] Migrate DIR_METADATA for components/web*

Migrate all metadata files for components/web* and mixins
used by metadata files under components/web*.

Verify components with http://b/components/{id} or at
go/chrome-on-buganizer-prod-components.

Bug: chromium:1518875
Change-Id: Idccd2ffe25598f92e07ffa980a9c458a98696d28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5273624
Reviewed-by: Colin Blundell <[email protected]>
Commit-Queue: Colin Blundell <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1257295}
diff --git a/components/web_package/DIR_METADATA b/components/web_package/DIR_METADATA
index 2352b85e..247a477 100644
--- a/components/web_package/DIR_METADATA
+++ b/components/web_package/DIR_METADATA
@@ -1,5 +1,7 @@
-monorail {
+monorail: {
   component: "Blink>Loader>WebPackaging"
 }
-
 team_email: "[email protected]"
+buganizer_public: {
+  component_id: 1456230
+}