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
binaryCommunication = in.readOptionalBoolean();
        if (in.getVersion().onOrAfter(Version.V_7_14_0)) {
            this.waitForCompletionTimeout = in.readOptionalTimeValue();
            this.keepOnCompletion = in.readBoolean();
            this.keepAlive = in.readOptionalTimeValue();
        }
    }
    /**
    * The key that must be sent back to SQL to access the next page of
    * results.
    */
    public String cursor() {
        return cursor;
    }
    /**
     * The key that must be sent back to SQL to access the next page of
     * results.
     */
    public SqlQueryRequest cursor(String cursor) {
        if (cursor == null) {
            throw new IllegalArgumentException("cursor may not be null.");
        }
        this.cursor = cursor;
        return this;
    }
    /**
     * Should format the values in a columnar fashion or not (default false).
     * Depending on the format used (csv, tsv, txt, json etc) this setting will be taken into
     * consideration or not, depending on whether it even makes sense for that specific format or not.
     */