Add CI workflow for detecting breaking changes

[tpaschalis]

How would you feel about a CI workflow that blocks (or just warns) on any breaking changes to the Protobuf schema?

I understand that the spec is relatively stable and has a lot of eyes on it, but something could potentially slip nevertheless.
There's different tools like buf-breaking and proto-breaking-change-detector that could be used here.

What do you think?

[tigrannajaryan]

It would be definitely useful. Something similar to what we have at https://github.com/open-telemetry/opentelemetry-proto/blob/main/.github/workflows/build-check.yaml

[mertssmnoglu]

May I attempt to create a workflow for this issue, which I believe is still open?