feat(metrics): support Datadog metric origin metadata (vectordotdev#18405)

* add the new origin metadata to the EventMetadata

* set OriginService in log_to_metric transform

* decode unknown protobuf fields with protofish

* experiment with parsing the Origin metadata field by specifying in the proto

* start adding the metadata to the series in dd metrics sink

* add logic for setting the non-pass through metadata in dd metrics sink

* add tests, implement for sketches

* touch up

* cleanup

* doc

* typo

* fix transform unit tests

* check events

* remove internal/deprecated fields

* docs

* feedback ds: static str

* feedback ds and js

* delete

* review feedback

* pass origin metadata in vector proto

* fix issue with native codec unit test. add breaking change deprecation notice

* check fmt/markdown

* restore json

* Revert "restore json"

This reverts commit e46319b.

* make metric series proto backwards compatible

* comment out test for functionality that is broken

* check events

* update patch files

* Revert "make metric series proto backwards compatible"

This reverts commit b4190b2.

* add the GH issue to the TODO

* whitespace in proto

* gitattribute

* feedback

---------

Co-authored-by: Doug Smith <[email protected]>

Author: neuronull

.gitattributes

@@ -11,4 +11,5 @@ Makefile linguist-detectable=false
 
 distribution/helm/*/charts/*.tgz filter=lfs diff=lfs merge=lfs -text
 
+lib/codecs/tests/data/** linguist-generated=true
 tests/helm-snapshots/**/snapshot.yaml linguist-generated=true