auth: Add reAuthReason field in aws_loginWithBrowser (aws#767)

When the user logs in with the browser AND it is due to
reauth, we want to know why they need to reauth. This will
explain why.

Signed-off-by: Nikolas Komonen <[email protected]>

Author: nkomonen-amazon

telemetry/definitions/commonDefinitions.json

@@ -1285,6 +1285,11 @@
             "type": "string",
             "description": "Error message detail. May contain arbitrary message details (unlike the `reason` field), but should be truncated (recommendation: 200 chars)."
         },
+        {
+            "name": "reAuthReason",
+            "type": "string",
+            "description": "Why was the connection/session put in to a state where it needs to be reauthenticated?"
+        },
         {
             "name": "referencePolicyType",
             "type": "string",
@@ -2283,6 +2288,10 @@
                     "type": "isReAuth",
                     "required": false
                 },
+                {
+                    "type": "reAuthReason",
+                    "required": false
+                },
                 {
                     "type": "result"
                 },