release: automate the release for this project

[v1v]

I took some of the changes done in elastic/elastic-otel-node#138
and enable the automation to release through Github workflows using a service machine account.

I also created two different workflows:

• the one supporting the ecs-helpers package
• the other one supporting the other packages.

[v1v]

@elastic/apm-agent-node-js , I need your input 🙏

[trentm]

What's the requirement here? Do we need to change the publishing of the packages in this repo over to publishing via GH Actions?

(From a brief look, the GH workflows are mostly fine. Note that I haven't typically in the past released all three ecs-*-format packages everytime, usually just one at a time if it had a relevant change.)