Refactor FXIOS [Nimbus] Update initial experiments JSON for Nimbus (backport #29293) (#29294)

Refactor FXIOS [Nimbus] Update initial experiments JSON for Nimbus (#29293)

update initial_experiments.json based on the current first-run experiments in experimenter


(cherry picked from commit 3edd8f1)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: mergify[bot]

firefox-ios/Client/Experiments/initial_experiments.json

@@ -556,20 +556,20 @@
     },
     {
       "schemaVersion": "1.12.0",
-      "slug": "shake-to-summarize-apple-intelligence-rollout",
-      "id": "shake-to-summarize-apple-intelligence-rollout",
+      "slug": "summarizer-apple-intelligence-rollout-beta-test",
+      "id": "summarizer-apple-intelligence-rollout-beta-test",
       "arguments": {},
       "application": "org.mozilla.ios.Firefox",
       "appName": "firefox_ios",
       "appId": "org.mozilla.ios.Firefox",
       "channel": "release",
-      "userFacingName": "Summarizer - Apple Intelligence Rollout",
+      "userFacingName": "Summarizer - Apple Intelligence Full Release Rollout",
       "userFacingDescription": "Summarizer",
       "isEnrollmentPaused": false,
       "isRollout": true,
       "bucketConfig": {
         "randomizationUnit": "nimbus_id",
-        "namespace": "ios-apple-summarizer-feature-release-ios_apple_intelligence_available_user-rollout-1",
+        "namespace": "ios-apple-summarizer-feature-release-no_targeting-rollout-1",
         "start": 0,
         "count": 10000,
         "total": 10000
@@ -601,8 +601,8 @@
           ]
         }
       ],
-      "targeting": "(is_apple_intelligence_available) && (app_version|versionCompare('143.!') >= 0) && (language in ['en'])",
-      "startDate": "2025-08-29",
+      "targeting": "(app_version|versionCompare('143.!') >= 0) && (language in ['en'])",
+      "startDate": "2025-09-11",
       "enrollmentEndDate": null,
       "endDate": null,
       "proposedDuration": 28,
@@ -611,7 +611,7 @@
       "featureValidationOptOut": false,
       "localizations": null,
       "locales": null,
-      "publishedDate": "2025-08-29T19:27:24.903506Z",
+      "publishedDate": "2025-09-11T16:58:59.108457Z",
       "isFirefoxLabsOptIn": false,
       "firefoxLabsTitle": "",
       "firefoxLabsDescription": "",