We need to offer an easy-to-use version of https://github.com/sourcegraph/sourcegraph/blob/main/internal/telemetrygateway/v1/telemetrygateway.proto via pre-generated Go proto bindings that can be imported by managed services, following the enablement done for managed services in https://github.com/sourcegraph/sourcegraph/pull/60991

The tricky part is that internal/telemetrygateway/v1 has some constructor helpers that are quite specific to Sourcegraph instance use cases. The easiest way might be to simply generate another set of bindings, or move some of the constructor helpers elsewhere, or move the bindings elsewhere.

Whatever we publish, we can send this to a standalone repo, or have a lib/telemetrygateway/go.mod for external consumers. The latter would be easier to implement, and easier for in-monorepo managed services to use (no circular dependency)

Would unblock/make life easier for:

• https://github.com/sourcegraph/sourcegraph-accounts/issues/164
• https://github.com/sourcegraph/cody/issues/1958#issuecomment-1997681756