Generally available: New X5 series with 50% larger memory instances

## Feature Feature **Generally available**: New X5 series with 50% larger memory instances: Breaking the previous 32TB memory limit of the X4[memory-optimized machine type](https://cloud.google.com/compute/docs/memory-optimized-machines), a new X5 series introduces massive 48TB configurations. This empowers the largest SAP HANA and RISE with SAP customers to easily scale up their mission-critical databases on a single node.