[BACKPORT 2.20][#23947] Update callhome URL to use https

Summary:
Changing the callhome URL to use https.
Original commit: add83ef / D38089

Test Plan: Manaul Test

Reviewers: djiang

Reviewed By: djiang

Subscribers: yugabyted-dev

Differential Revision: https://phorge.dev.yugabyte.com/D38177

bin/yugabyted

@@ -3685,7 +3685,7 @@ class ControlScript(object):
     def callhome(self):
         if self.configs.saved_data.get("callhome"):
             try:
-                url = "http://diagnostics.yugabyte.com"
+                url = "https://diagnostics.yugabyte.com"
                 headers = {
                     "Content-Type": "application/json",
                     "User-Agent": "Mozilla",