tools: owners: reduce notify spam from Jenkins

By default, the Gerrit 'reviewers' API will notify everyone of
the change to add a new reviewer.  When adding reviewers automatically
from Jenkins this can cause quite a bit of spam.  Adjust the 'notify'
fields of the API call so that only the newly-added reviewer is
notified.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ib992284918145a31c9ff749737b3ae09f4d5ef0e
diff --git a/tools/owners b/tools/owners
index d35fe5f..c5a9736 100755
--- a/tools/owners
+++ b/tools/owners
@@ -122,10 +122,21 @@
     # Print as Gerrit Add Reviewers POST format.
     # https://gerrit.openbmc.org/Documentation/rest-api-changes.html#add-reviewer
     else:
+
+        def review_js(reviewer: str, state: str) -> str:
+            return json.dumps(
+                {
+                    "reviewer": reviewer,
+                    "state": state,
+                    "notify": "NONE",
+                    "notify_details": {"TO": {"accounts": [reviewer]}},
+                }
+            )
+
         for o in sorted(matcher.owners):
-            print(json.dumps({"reviewer": o, "state": "REVIEWER"}))
+            print(review_js(o, "REVIEWER"))
         for r in sorted(matcher.reviewers):
-            print(json.dumps({"reviewer": r, "state": "CC"}))
+            print(review_js(r, "CC"))
 
 
 def main() -> None:
@@ -141,7 +152,7 @@
     parser_reviewers.add_argument(
         "--push-args",
         default=False,
-        action='store_true',
+        action="store_true",
         help="Format as git push options",
     )
     parser_reviewers.add_argument(