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/sql-action/src/main/java/org/elasticsearch/xpack/sql/action/SqlQueryRequest.java
indexIncludeFrozen,
            binaryCommunication,
            waitForCompletionTimeout,
            keepOnCompletion,
            keepAlive
        );
    }
    @Override
    public boolean equals(Object obj) {
        return super.equals(obj)
            && Objects.equals(cursor, ((SqlQueryRequest) obj).cursor)
            && Objects.equals(columnar, ((SqlQueryRequest) obj).columnar)
            && fieldMultiValueLeniency == ((SqlQueryRequest) obj).fieldMultiValueLeniency
            && indexIncludeFrozen == ((SqlQueryRequest) obj).indexIncludeFrozen
            && binaryCommunication == ((SqlQueryRequest) obj).binaryCommunication
            && Objects.equals(waitForCompletionTimeout, ((SqlQueryRequest) obj).waitForCompletionTimeout)
            && keepOnCompletion == ((SqlQueryRequest) obj).keepOnCompletion
            && Objects.equals(keepAlive, ((SqlQueryRequest) obj).keepAlive);
    }
    @Override
    public String getDescription() {
        return "SQL [" + query() + "][" + filter() + "]";
    }
    public static SqlQueryRequest fromXContent(XContentParser parser) {
        SqlQueryRequest request = PARSER.apply(parser, null);
        validateParams(request.params(), request.mode());
        return request;
    }
}