Update Pub/Sub Emulator

Update Local Emulator Run the following command to make sure you have the latest version of the pubsub emulator installed via gcloud:
```
gcloud components update pubsub-emulator
```
Locate Emulator Directory The emulator represents a directory likely located at <gcloud-install-path>/platform/pubsub-emulator. You can find the exact path by running the emulator and checking the output, or by inspecting where gcloud is installed (e.g. which gcloud usually points to a bin directory, and the platform directory is a sibling of bin). Verify the version by running the emulator or checking the VERSION file if it exists.
Package the Emulator Zip the directory found in the previous step. Name it pubsub-emulator-<version>.zip. Ensure the zip structure is such that the top-level directory inside the zip is pubsub-emulator. Note: The existing code expects the binary at pubsub-emulator-<version>/pubsub-emulator/bin/cloud-pubsub-emulator inside the cache, which usually means the zip contains a root folder pubsub-emulator.