[CI] exclude Xcode 16.2 for macOS testing

Author: shahmishal

.github/workflows/pull_request.yml

@@ -23,6 +23,7 @@ jobs:
       enable_linux_static_sdk_build: true
       linux_static_sdk_build_command: SWIFTBUILD_STATIC_LINK=1 LLBUILD_STATIC_LINK=1 swift build
       enable_macos_checks: true
+      macos_exclude_xcode_versions: "[{\"xcode_version\": \"16.2\"}]"
   cmake-smoke-test:
     name: cmake-smoke-test
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main