[ci] Check macOS 15 for Xcode analyzer warnings (#9427)

Xcode 16 is available in CI as of #8968. Check all packages for macOS 15 deprecations.

The last bump #7544

Related flutter/plugins#5778 and flutter/flutter#102835

## Pre-Review Checklist

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

Author: jmagman

.ci/targets/macos_platform_tests.yaml

@@ -15,7 +15,7 @@ tasks:
   - name: xcode analyze deprecation
     # Ensure we don't accidentally introduce deprecated code.
     script: .ci/scripts/tool_runner.sh
-    args: ["xcode-analyze", "--macos", "--macos-min-version=14.0", "--exclude=script/configs/exclude_xcode_deprecation.yaml,script/configs/xcode_warnings_exceptions.yaml"]
+    args: ["xcode-analyze", "--macos", "--macos-min-version=15.0", "--exclude=script/configs/exclude_xcode_deprecation.yaml,script/configs/xcode_warnings_exceptions.yaml"]
   - name: native test
     script: .ci/scripts/tool_runner.sh
     args: ["native-test", "--macos", "--xcode-warnings-exceptions=script/configs/xcode_warnings_exceptions.yaml"]