Revert "Upgrade to Xcode 16 to build against iOS SDK 18 (#6061)"

This reverts commit d4e7adf.

Author: nirvn

.github/workflows/ios.yml

@@ -20,7 +20,7 @@ env:
 jobs:
   build:
     name: build (ios)
-    runs-on: macos-15
+    runs-on: macos-14
     env:
       DEPLOYMENT_TARGET: '14.0'
       BUILD_TYPE: 'Release'
@@ -37,7 +37,7 @@ jobs:
         if: ${{ env.SENTRY_AUTH_TOKEN != '' }}
         run: |
           rm -rf /Applications/Xcode_14*
-          rm -rf /Applications/Xcode_15*
+          rm -rf /Applications/Xcode_16*
           rm -rf /Users/runner/Library/Android/sdk
 
       - name: 🌾 Prepare variables
@@ -59,11 +59,13 @@ jobs:
           ruby-version: '3.2' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
 
-      - name: 🍭 Setup XCode
-        uses: maxim-lobanov/[email protected]
+      - name: 🔏 Setup code signing
         if: ${{ env.SENTRY_AUTH_TOKEN != '' }}
-        with:
-          xcode-version: 16.2
+        env:
+          MATCH_PASSWORD: ${{ secrets.MATCH_PASSWORD }}
+        run: |
+          bundle exec fastlane ios setup_signing type:${{ env.IOS_SIGN_TYPE }}  app_identifier:${{ env.IOS_APP_IDENTIFIER }} #  --verbose
+
 
       - name: 🍹 Prepare ios build env
         if: ${{ env.SENTRY_AUTH_TOKEN != '' }}
@@ -90,6 +92,12 @@ jobs:
         with:
           python-version: '3.11'
 
+      - name: 🍭 Setup XCode
+        uses: maxim-lobanov/[email protected]
+        if: ${{ env.SENTRY_AUTH_TOKEN != '' }}
+        with:
+          xcode-version: latest-stable
+
       - name: 🍮 ccache
         uses: hendrikmuhs/ccache-action@v1
         if: ${{ env.SENTRY_AUTH_TOKEN != '' }}
@@ -143,13 +151,6 @@ jobs:
           path: |
             /Users/runner/builddir/**/*.log
 
-      - name: 🔏 Setup code signing
-        if: ${{ env.SENTRY_AUTH_TOKEN != '' }}
-        env:
-          MATCH_PASSWORD: ${{ secrets.MATCH_PASSWORD }}
-        run: |
-          bundle exec fastlane ios setup_signing type:${{ env.IOS_SIGN_TYPE }}  app_identifier:${{ env.IOS_APP_IDENTIFIER }} #  --verbose
-
       - name: 📦 Package
         if: ${{ env.SENTRY_AUTH_TOKEN != '' }}
         run: |