Frozen indices are deprecated which makes all the [SQL features supporting frozen indices](https://www.elastic.co/guide/en/elasticsearch/reference/current/sql-index-frozen.html) obsolete.

This includes:

* `index_include_frozen` request parameter in the `_sql` endpoint
* `index.include.frozen` (J|O)DBC driver settings
* `SHOW TABLES INCLUDE FROZEN` queries and the `FROZEN INDEX` kind in the corresponding response
* The `FROZEN` modifier in `FROM` clauses (as in `SELECT * FROM FROZEN archive`)

`_search` raises a deprecation warning when frozen indices are being searched with `ignore_throttled=false`. SQL could do the same when the `index_include_frozen` request parameter is set or when the `FROZEN` keyword is used.

Relates to https://github.com/elastic/elasticsearch/issues/70192
x-pack/plugin/sql/qa/server/src/main/java/org/elasticsearch/xpack/sql/qa/rest/BaseRestSqlTestCase.java
return this;
        }
        public RequestObjectBuilder filter(String filter) {
            request.append(field(FILTER_NAME, filter));
            return this;
        }
        public RequestObjectBuilder params(String params) {
            request.append(field(PARAMS_NAME, params));
            return this;
        }
        public RequestObjectBuilder columnar(Boolean columnar) {
            request.append(field(COLUMNAR_NAME, columnar));
            return this;
        }
        public RequestObjectBuilder binaryFormat(Boolean binaryFormat) {
            request.append(field(BINARY_FORMAT_NAME, binaryFormat));
            return this;
        }
        public RequestObjectBuilder waitForCompletionTimeout(String timeout) {
            request.append(field(WAIT_FOR_COMPLETION_TIMEOUT_NAME, timeout));
            return this;
        }
        public RequestObjectBuilder keepOnCompletion(Boolean keepOnCompletion) {
            request.append(field(KEEP_ON_COMPLETION_NAME, keepOnCompletion));
            return this;
        }
        public RequestObjectBuilder keepAlive(String keepAlive) {
            request.append(field(KEEP_ALIVE_NAME, keepAlive));
            return this;
        }