update clickhouse materialized views to identify otel spans based on `hive.kind` attributes

The `otel_traces_normalized_mv` materialized view should not rely on the condition for identifying a trace.

```
WHERE
empty("ParentSpanId")
AND notEmpty("SpanAttributes"['hive.graphql'])
```

Instead we want to do it based on the `hive.kind` attribute specified in https://www.notion.so/theguildoss/Tracing-2ceb6b71848a80779e94e7514284b2f4

_____

Related links:
- https://github.com/graphql-hive/gateway/issues/2010
- https://www.notion.so/theguildoss/Tracing-2ceb6b71848a80779e94e7514284b2f4