Support Google Cloud destination

[yu-iskw]

As OpenLLMetry in python supports the Google Cloud destination, I want openllmetry-js supports it as well.

https://www.traceloop.com/docs/openllmetry/integrations/gcp

[yu-iskw]

@nirga I am so sorry for bothering you. but I appreciate if you could give advice to support the Google Cloud destination in openllmetry-js as well. I want to integrate it with Google Cloud. I would love to contribute.

https://www.traceloop.com/docs/openllmetry/integrations/gcp#llm-observability-with-google-cloud-and-openllmetry