[ios] Use macOS 14+ARM in workflow; bump xcodeVersion

We no longer use libcrypto in builds, so we are not beholden to an x86
dependency for simulator.

Bumping xcode version also fixes PinsStorage issue from earlier.

.github/workflows/swift-test.yml

@@ -18,7 +18,7 @@ env:
 
 jobs:
   test-swift:
-    runs-on: macos-13 # macos 14 is ARM only and our tests don't run on ARM simulators due to libcrypto
+    runs-on: macos-14
 
     permissions:
       actions: none
@@ -55,7 +55,7 @@ jobs:
           cargo --version
           rustc --version
       - name: Add rust target
-        run: rustup target add x86_64-apple-ios # aarch64-apple-ios-sim
+        run: rustup target add aarch64-apple-ios-sim
       - name: Lint
         working-directory: ./app-ios
         run: ./lint.sh lint:check

xcodegen_common.yml

@@ -1,5 +1,6 @@
 # Shared configuations for XCodeGen projects
 options:
+  xcodeVersion: "15.3"
   minimumXCodeGenVersion: 2.41.0
   createIntermediateGroups: true
   developmentLanguage: "en"