https://github.com/open-telemetry/opentelemetry-rust/blob/main/opentelemetry-sdk/src/metrics/meter.rs#L385 is only validating name,unit etc. We should validate the buckets at this point, and if validation fails, we should either 1. Return no-op instrument as do when other validation fails. 2. Use default bounds, and ignore the user-provided one. Emit WARN internal log in either case.