fix(testing): use UUID based SSTables for testing

UUID SSTables are the default in newer Scylla version,
so we should focus on testing them and mock integer
based SSTables when needed.

Ref #4182

testing/scylla/config/scylla.yaml

@@ -645,6 +645,4 @@ api_doc_dir: /usr/lib/scylla/api/api-doc/
 alternator_port: 8000
 alternator_write_isolation: only_rmw_uses_lwt
 alternator_enforce_authorization: true
-enable_ipv6_dns_lookup: true
-
-uuid_sstable_identifiers_enabled: false
+enable_ipv6_dns_lookup: true