Remove default for --registry option with --v2 and/or --future #1279
Description
weaver registry {command} defaults to semconv main branch when registry is not provided explicitly. It does not make sense:
- only semconv need to run against semconv repo, other registries should use theirs
- live-check should not run against semconv main branch, it could run against specific released version. It should be possible to run against latest released version or it may run against schema_url received in the telemetry.
So with some modifications it makes sense for live-check, but it can be added later. While we have unstable window with v2 I think we should stop supporting default registry all together and can bring it back for specific commands later