chore(ci): Fix flaky iOS native tests by removing OS=latest

The OS=latest parameter in xcodebuild destination is unreliable on GitHub's
macos-15 runners due to frequent simulator runtime deprecations. By omitting
the OS version, xcodebuild automatically selects any available iPhone 16
simulator, making the tests more stable across runner image updates.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: antonis

.github/workflows/native-tests.yml

@@ -54,7 +54,7 @@ jobs:
         env:
           SCHEME: RNSentryCocoaTester
           CONFIGURATION: Release
-          DESTINATION: 'platform=iOS Simulator,OS=latest,name=iPhone 16'
+          DESTINATION: 'platform=iOS Simulator,name=iPhone 16'
         run: |
           env NSUnbufferedIO=YES \
             xcodebuild -workspace *.xcworkspace \