Trying to hit the [execute API](https://www.elastic.co/guide/en/elasticsearch/painless/8.5/painless-execute-api.html) with an index that in available via cross cluster search will fail with an `IllegalArgumentException`: `Cross-cluster calls are not supported in this context but remote indices were requested`

That is because `PainlessExecuteAction`'s [`TransportAction`](https://github.com/elastic/elasticsearch/blob/8.5/modules/lang-painless/src/main/java/org/elasticsearch/painless/action/PainlessExecuteAction.java#L462) is a [`TransportSingleShardAction`](https://github.com/elastic/elasticsearch/blob/8.5/server/src/main/java/org/elasticsearch/action/support/single/shard/TransportSingleShardAction.java#L153) which uses [`IndexNameExpressionResolver.concreteIndices`](https://github.com/elastic/elasticsearch/blob/8.5/server/src/main/java/org/elasticsearch/cluster/metadata/IndexNameExpressionResolver.java#L331), which does not support remote clusters.

What would it take it enable PainlessExecuteAction to support CCS?

Kibana uses the execute api to validate runtime fields on edit, see https://github.com/elastic/kibana/issues/145861
modules/lang-painless/src/test/java/org/elasticsearch/painless/action/PainlessExecuteApiTests.java
new Script(
                ScriptType.INLINE,
                "painless",
                "emit(3.1); emit(2.29); emit(-12.47); emit(-12.46); emit(Double.MAX_VALUE); emit(0.0);",
                emptyMap()
            ),
            "double_field",
            contextSetup
        );
        response = innerShardOperation(request, scriptService, indexService);
        doubles = (List<Double>) response.getResult();
        assertEquals(3.1, doubles.get(0), 0.00001);
        assertEquals(2.29, doubles.get(1), 0.00001);
        assertEquals(-12.47, doubles.get(2), 0.00001);
        assertEquals(-12.46, doubles.get(3), 0.00001);
        assertEquals(Double.MAX_VALUE, doubles.get(4), 0.00001);
        assertEquals(0.0, doubles.get(5), 0.00001);
    }
    @SuppressWarnings("unchecked")
    public void testGeoPointFieldExecutionContext() throws IOException {
        ScriptService scriptService = getInstanceFromNode(ScriptService.class);
        IndexService indexService = createIndex("index", Settings.EMPTY, "doc", "test_point", "type=geo_point");
        Request.ContextSetup contextSetup = new Request.ContextSetup(
            "index",
            new BytesArray("{\"test_point\":\"30.0,40.0\"}"),
            new MatchAllQueryBuilder()
        );
        contextSetup.setXContentType(XContentType.JSON);
        Request request = new Request(
            new Script(ScriptType.INLINE, "painless", "emit(doc['test_point'].value.lat, doc['test_point'].value.lon)", emptyMap()),