Document and test supported versions of Go

[dmathieu]

Fixes #195

[dmathieu]

I'm pondering adding a compatibility statement similar to the otel-go one.
https://github.com/open-telemetry/opentelemetry-go/tree/main?tab=readme-ov-file#compatibility

We don't really publish new releases with new Go versions though, and since this code is fully auto-generated, this may be a bit too much.

[pellared]

I think that we should have compatibility tests for all supported versions of Go (currently 1.22 and 1.23). These tests can be run on Ubuntu runner as there is no OS-specific code.

Right now there is nothing that checks if the generated code actually builds.

[dmathieu]

Once this is merged, I will make the compatibility-test check required.

[pellared]

Once this is merged, I will make the compatibility-test check required.

I think you can do it even before merging 😉

[dmathieu]

It would prevent any other PR from being merged before this one.

[pellared]

Something is wrong. go.sum files should not be empty.

[dmathieu]

Their size has vastly reduced. They are not empty though.
Their content is retrieved from running go mod tidy.