This commit adds a link to the Limitations section on the Tablets page to the CQL pag, the tablets option. This is actually the place where the user will need the information: when creating a keyspace. In addition, I've reorganized the section for better readability (otherwise, the section about limitations was easy to miss) and moved the section up on the page. Note that I've removed the updated content from the `_common` folder (which I deleted) to the .rst page - we no longer split OSS and Enterprise, so there's no need to keep using the `scylladb_include_flag` directive to include OSS- and Ent-specific content. Fixes https://github.com/scylladb/scylladb/issues/22892 Fixes https://github.com/scylladb/scylladb/issues/22940 Closes scylladb/scylladb#22939