Revert "Bug 1964428 - Remove coarse_os_version and add country to newtab-content ping r=home-newtab-reviewers,amy" for causing conflict when backing out Bug 1964445

This reverts commit 69f1aedced.

browser/components/newtab/metrics.yaml

@@ -1869,6 +1869,24 @@ newtab_content:
     send_in_pings:
       - newtab-content
 
+  coarse_os_version:
+    type: string
+    description: |
+      The user-visible version of the operating system (e.g. "1.2.3").
+      If the version detection fails, this metric gets set to 0.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1956331
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1956331
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - nbarrett@mozilla.com
+    expires: never
+    lifetime: application
+    send_in_pings:
+      - newtab-content
+
   utc_offset:
     type: quantity
     description: >
@@ -1888,30 +1906,6 @@ newtab_content:
     lifetime: application
     unit: utc offset
 
-  country:
-    type: string
-    description: >
-      Records the detected home region of the user. This is the general region
-      of the user's machine.
-
-      If a machine moves location, there is a minimum 2-week delay before this
-      will be updated.
-
-      See the [Region documentation](https://firefox-source-docs.mozilla.org/toolkit/modules/toolkit_modules/Region.html)
-      for more information about updates.
-    bugs:
-      - https://bugzilla.mozilla.org/show_bug.cgi?id=1964428
-    data_reviews:
-      - https://bugzilla.mozilla.org/show_bug.cgi?id=1964428
-    data_sensitivity:
-      - technical
-    notification_emails:
-      - nbarrett@mozilla.com
-    expires: never
-    send_in_pings:
-      - newtab-content
-    lifetime: application
-
   surface_id:
     type: string
     description: >