Update DLQ writer writeEntry to switch from plugin_type/plugin_id to elemenet_type/element_id

[andsel]

The DeadLetterQueueWriter.writeEntry method

logstash/logstash-core/src/main/java/org/logstash/common/io/DeadLetterQueueWriter.java

Line 397 in 3e98cb1

public void writeEntry(Event event, String pluginName, String pluginId, String reason) throws IOException {

accepts two parameters to identify which is the entity that generated the DLQ event.
As of today to identify that entity, the plugin type and plugin id was enough, for example (output, 123456) but with the introduction of #16423 to enqueue also events that fails a conditional evaluation, becomes more meaningful the element_type (such as output, input, if-statement) and element_id (the id of plugin instance or could be the source reference for conditionals).

This means that the @metadata in DLQ input are not

"@metadata" => {
        "dead_letter_queue" => {
             "entry_time" => 2024-09-17T14:45:27.999153Z,
              "plugin_id" => "if-statement",
            "plugin_type" => "if-statement",
                 "reason" => "condition evaluation error, Unexpected conditional input combination of '<no-class>:<null-value>' (left) and 'class org.jruby.RubyFixnum:100' (right)"
        }
    }

but should become like:

"@metadata" => {
  "dead_letter_queue" => {
    "element_id" => ...
    "element_type" => ...
   ...
  }
}