A preview call can be quite expensive and cause timeout in a cluster. As a short term fix we identified 2 (hopefully) small fixes:

- make the call cancellable, the main issue here seems to be that preview calls search without using a parent task id(see this fix for data feeds: https://github.com/elastic/elasticsearch/pull/88142/files#diff-aba58244cb8f9dfa3ac3b6efeb02259e3d5956576f56c1ff5e243dd2aac27381)
- pass the timeout parameter of the preview call to the search call, currently a timeout can be specified, but is ignored for the inner search call, which is executed with no timeout (see https://www.elastic.co/guide/en/elasticsearch/reference/master/search-search.html#search-search-api-query-params).

Both changes are bugs and shall be relatively simple to implement and considered for backport to the 7.17 branch.

@przemekwitek can you have a look at this?

related: #88010
x-pack/plugin/transform/src/main/java/org/elasticsearch/xpack/transform/action/TransportValidateTransformAction.java
)) {
                return;
            }
        }
        TransformNodes.warnIfNoTransformNodes(clusterState);
        final TransformConfig config = request.getConfig();
        final Function function = FunctionFactory.create(config);
        if (config.getVersion() == null || config.getVersion().before(TransformDeprecations.MIN_TRANSFORM_VERSION)) {
            listener.onFailure(
                new ValidationException().addValidationError(
                    format(
                        "Transform configuration is too old [%s], use the upgrade API to fix your transform. "
                            + "Minimum required version is [%s]",
                        config.getVersion(),
                        TransformDeprecations.MIN_TRANSFORM_VERSION
                    )
                )
            );
            return;
        }
        
        ActionListener<Map<String, String>> deduceMappingsListener = ActionListener.wrap(
            deducedMappings -> { listener.onResponse(new Response(deducedMappings)); },
            deduceTargetMappingsException -> listener.onFailure(
                new RuntimeException(TransformMessages.REST_PUT_TRANSFORM_FAILED_TO_DEDUCE_DEST_MAPPINGS, deduceTargetMappingsException)
            )
        );
        
        ActionListener<Boolean> validateQueryListener = ActionListener.wrap(validateQueryResponse -> {
            if (request.isDeferValidation()) {