fix(app, expo): match scene-based AppDelegate for Expo SDK 58 config plugin

[russellwheatley]

• Fixes [🐛] Expo SDK 58 scene-based AppDelegate: config plugin skips FirebaseApp.configure() #9331

Expo SDK 58 starts React Native from the scene delegate, so the config plugin no longer finds self.moduleName or factory.startReactNative( and skips FirebaseApp.configure().

• Also match return super.application(application, didFinishLaunchingWithOptions: launchOptions) and insert FirebaseApp.configure() above it
• Treat internal import Expo as an anchor for import FirebaseCore
• Add an SDK 58 fixture. Existing SDK 53 snapshots stay the same

---

Maintainer note: Fixes internal CPRN-495

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.81%. Comparing base (50a946a) to head (37d5fb2).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #9336   +/-   ##
=========================================
  Coverage     69.81%   69.81%           
  Complexity     2129     2129           
=========================================
  Files           439      439           
  Lines         25518    25518           
  Branches       4257     4257           
=========================================
  Hits          17814    17814           
  Misses         6360     6360           
  Partials       1344     1344           

Flag	Coverage Δ
android-native	65.91% <ø> (ø)
e2e-ts-android	54.42% <ø> (ø)
e2e-ts-ios	53.89% <ø> (ø)
e2e-ts-macos	49.95% <ø> (ø)
ios-ruby	100.00% <ø> (ø)
jest	48.83% <100.00%> (ø)

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[mikehardy]

good to go