[iOS] Added PasswordEditInSettings to the fieldtrial_testing_config.json

This change adds Password Edit feature to testing config.

Bug: 377410
Change-Id: I9a950611f1462d43b8c6770f90b2f62da53b297b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2474875Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Viktor Semeniuk <vsemeniuk@google.com>
Cr-Commit-Position: refs/heads/master@{#817555}

testing/variations/fieldtrial_testing_config.json

@@ -5224,6 +5224,24 @@
             ]
         }
     ],
+    "PasswordEditingInSettings": [
+        {
+            "platforms": [
+                "chromeos",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "PasswordEditingInSettings"
+                    ]
+                }
+            ]
+        }
+    ],
     "PasswordScriptsFetching": [
         {
             "platforms": [