Use the xcode-16.2-macos-14.7.1-v1 CI image (#23894)

Author: spencertransier

.buildkite/shared-pipeline-vars

@@ -7,6 +7,5 @@
 XCODE_VERSION=$(sed -E 's/^~> ?//' .xcode-version)
 CI_TOOLKIT_PLUGIN_VERSION="3.7.1"
 
-# Note: `-v4` suffix was added to use xcode-16.1-v4 image; remember to remove that suffix during the next Xcode update
-export IMAGE_ID="xcode-$XCODE_VERSION-v4"
+export IMAGE_ID="xcode-$XCODE_VERSION-macos-14.7.1-v1"
 export CI_TOOLKIT_PLUGIN="automattic/a8c-ci-toolkit#$CI_TOOLKIT_PLUGIN_VERSION"

.xcode-version

@@ -1 +1 @@
-16.1
+16.2