This PR: - Removes n1-highmem instances from Recommended Instances. - Adds missing support for n2-highmem-96. - Updates the reference to n2 instances in the Google Cloud docs (fixes a broken link to GCP). - Adds the missing information about processors for n2-highmem-instance - Ice Lake and Cascade Lake (requested by CX). Fixes https://github.com/scylladb/scylladb/issues/25946 Fixes https://github.com/scylladb/scylladb/issues/24223 Fixes https://github.com/scylladb/scylladb/issues/23976 No backport needed if this PR is merged before 2025.4 branching. Closes scylladb/scylladb#26182 * github.com:scylladb/scylladb: doc: update information for n2-highmem instances doc: remove n1-highmem instances from Recommended Instances