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
public Boolean columnar() {
        return columnar;
    }
    public SqlQueryRequest columnar(boolean columnar) {
        this.columnar = columnar;
        return this;
    }
    public SqlQueryRequest fieldMultiValueLeniency(boolean leniency) {
        this.fieldMultiValueLeniency = leniency;
        return this;
    }
    public boolean fieldMultiValueLeniency() {
        return fieldMultiValueLeniency;
    }
    public SqlQueryRequest indexIncludeFrozen(boolean include) {
        this.indexIncludeFrozen = include;
        return this;
    }
    public boolean indexIncludeFrozen() {
        return indexIncludeFrozen;
    }
    public SqlQueryRequest binaryCommunication(boolean binaryCommunication) {
        this.binaryCommunication = binaryCommunication;
        return this;
    }
    public Boolean binaryCommunication() {
        return binaryCommunication;
    }
    public SqlQueryRequest waitForCompletionTimeout(TimeValue waitForCompletionTimeout) {
        this.waitForCompletionTimeout = waitForCompletionTimeout;