Refactor FXIOS [Nimbus] Update initial experiments JSON for Nimbus (backport #30475) (#30478)

Refactor FXIOS [Nimbus] Update initial experiments JSON for Nimbus (#30475)

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


(cherry picked from commit cf2e58a)

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

Author: mergify[bot]

firefox-ios/Client/Experiments/initial_experiments.json

@@ -69,6 +69,70 @@
       "firefoxLabsGroup": null,
       "requiresRestart": false
     },
+    {
+      "schemaVersion": "1.12.0",
+      "slug": "ios-new-onboarding-global-release",
+      "id": "ios-new-onboarding-global-release",
+      "arguments": {},
+      "application": "org.mozilla.ios.FirefoxBeta",
+      "appName": "firefox_ios",
+      "appId": "org.mozilla.ios.FirefoxBeta",
+      "channel": "beta",
+      "userFacingName": "iOS New Onboarding Global Release",
+      "userFacingDescription": "New onboarding",
+      "isEnrollmentPaused": false,
+      "isRollout": true,
+      "bucketConfig": {
+        "randomizationUnit": "nimbus_id",
+        "namespace": "ios-onboarding-framework-feature-beta-no_targeting-rollout-3",
+        "start": 0,
+        "count": 10000,
+        "total": 10000
+      },
+      "featureIds": [
+        "onboarding-framework-feature"
+      ],
+      "probeSets": [],
+      "outcomes": [],
+      "branches": [
+        {
+          "slug": "control",
+          "ratio": 1,
+          "feature": {
+            "featureId": "this-is-included-for-mobile-pre-96-support",
+            "enabled": false,
+            "value": {}
+          },
+          "features": [
+            {
+              "featureId": "onboarding-framework-feature",
+              "enabled": true,
+              "value": {
+                "enable-modern-ui": true,
+                "should-use-japan-configuration": false
+              }
+            }
+          ]
+        }
+      ],
+      "targeting": "(app_version|versionCompare('145.1.0') >= 0) && (!(language in ['ja']))",
+      "startDate": "2025-11-07",
+      "enrollmentEndDate": null,
+      "endDate": null,
+      "proposedDuration": 28,
+      "proposedEnrollment": 7,
+      "referenceBranch": "control",
+      "featureValidationOptOut": false,
+      "localizations": null,
+      "locales": null,
+      "publishedDate": "2025-11-07T16:46:00.226967Z",
+      "isFirefoxLabsOptIn": false,
+      "firefoxLabsTitle": "",
+      "firefoxLabsDescription": "",
+      "firefoxLabsDescriptionLinks": null,
+      "firefoxLabsGroup": "",
+      "requiresRestart": false
+    },
     {
       "schemaVersion": "1.12.0",
       "slug": "japan-onboarding",