Add a space after each colon and comma (if they don't have any after) in values of table option which are json objects (`caching`, `tombstone_gc` and `cdc`). This improves readability and matches client-side describe format. Fixes: #14895 Closes scylladb/scylladb#15900 * github.com:scylladb/scylladb: cql-pytest:test_describe: add test for whitespaces in json objects schema: add whitespace to description of table options