Feature Request: Support Storage Layout and Rapid Storage APIs

[suni72]

Please add support for Storage Layout API and Rapid Storage APIs to the fake-gcs-server. This will enable testing of new GCS features (like Zonal support) using fake-gcs-server for local integration testing.

Specific API Support Required

1. getStorageLayout API

Purpose: This API is used to determine bucket types (Zonal/HNS/Standard etc)

2. Zonal Bucket APIs (gRPC Bidi APIs in storage v2)

Purpose: gRPC Bidi APIs are used for reading/writing data from Zonal buckets.