Added DIR_METADATA files to //components/tab…

and  removed duplicated metadata from OWNERS files

Bug: 1113033
Change-Id: Icdb5dc11aeee764ed5f3d621dcb26517d9f5d617
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2570246
Auto-Submit: Norman Rosas <normando@google.com>
Commit-Queue: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833284}

components/tab_count_metrics/DIR_METADATA

+monorail {
+  component: "Internals>Metrics"
+}

components/tab_count_metrics/OWNERS

-# COMPONENT: Internals>Metrics
 # Use the above COMPONENT in crbugs to to file bugs against issues in this folder
-
 file://base/metrics/OWNERS

components/tab_groups/DIR_METADATA

+monorail {
+  component: "UI>Browser>TabStrip"
+}

components/tab_groups/OWNERS

-# COMPONENT: UI>Browser>TabStrip
 # Use the above COMPONENT in crbugs to to file bugs against issues in this folder
-
 file://chrome/browser/ui/tabs/OWNERS

components/tab_groups_strings_grdp/DIR_METADATA

+monorail {
+  component: "UI>Browser>TabStrip"
+}

components/tab_groups_strings_grdp/OWNERS

-# COMPONENT: UI>Browser>TabStrip
 # Use the above COMPONENT in crbugs to to file bugs against issues in this folder
-
 file://components/tab_groups/OWNERS