SAP HANA: support for deploying striped disk to host the data directory

## Feature **SAP HANA: support for deploying striped disk to host the data directory** To enable you to deploy striped disks for hosting the `/hana/data` directory, we have done the following: * Updated our documentation with the minimum sizes for SSD-based Persistent Disk and Hyperdisk volumes. For more information, see [Minimum sizes for SSD-based persistent disks and Hyperdisks](https://cloud.google.com/solutions/sap/docs/sap-hana-planning-guide#hana-minimum-pd-sizes-ssd-balanced)in the SAP HANA planning guide. * Introduced deployment automation support through the`enable_data_striping` Terraform argument. You can use this argument to provision a striped disk to host the `/hana/data` directory while deploying SAP HANA scale-up, scale-up HA, and scale-out HA systems with Terraform. This argument is available from version `1.3.674800406` of the Terraform modules `sap_hana` and `sap_hana_ha`, provided by Google Cloud. For more information, see the deployment guide for your[SAP HANA scenario](https://cloud.google.com/solutions/sap/docs/tf-for-sap#supported%5Fsap%5Fsolutions). ## Announcement **Google Cloud's Agent for SAP version 3.6** Version 3.6 of Google Cloud's Agent for SAP is generally available (GA). This version introduces striped disk support for SAP HANA backup and recovery by using the disk snapshot feature, metric enhancements for monitoring SAP HANA, and other minor enhancements. For more information, see [What's new with Google Cloud's Agent for SAP](https://cloud.google.com/solutions/sap/docs/agent-for-sap/whats-new).