Add X-Elastic-Product-Origin

[lucabelluccini]

Add the X-Elastic-Product-Origin header set to logstash (similar to https://github.com/elastic/beats/blob/3f44bd1f9bf0b3e17c8254119c464cbb7e872c71/libbeat/common/productorigin/productorigin.go#L24).

[donoghuc]

Thanks @lucabelluccini I missed this PR when working on #1195 . This should be completed now and shippin in => 11.22.10

[lucabelluccini]

This has been implemented differently by @donoghuc via

logstash-output-elasticsearch/lib/logstash/outputs/elasticsearch/http_client/manticore_adapter.rb

Line 5 in 936218d

DEFAULT_HEADERS = { "Content-Type" => "application/json", 'x-elastic-product-origin' => 'logstash-output-elasticsearch' }