Add `service.name` label to all metrics

[emschwartz]

As discussed here, we want to add a service service.name label to all the metrics we produce (all function. metrics and build_info).

It should be possible to load this label from an environment variable, or if there is an Autometrics initialization function it can be a parameter to that function. If a service name is not specified, the package name should be used by default.

All of the generated queries should be updated as well so that function metrics are identified by (function, module, service) (function, module, service_name).

• Spec Add service.name label to the spec #28
• Dashboards and alerting rules Rename metrics and add service_name #73
• VS Code extension
• Rust Add the service.name label to all metrics autometrics-rs#116
• Go Add a service.name label to all metrics autometrics-go#60
• Typescript Add service.name label to all metrics autometrics-ts#86
• Python Add service.name label to all metrics autometrics-py#61
• C# Add service.name label to all metrics autometrics-cs#12
• Java Add service.name label to all metrics jamsiedaly/autometricsj#4

[P2P-Nathan]

I'm for service labels and would like to drop a suggestion that when they hit the metrics they get added with the oTel service spec