Rename traces signoz_index_v2 columns

[makeavish]

Currently traces signoz_index_v2 column naming is not consistent with tag attributes

[srikanthccv]

We will need this four or five releases later, depending on when we start working on signal correlation, as there will be a need to use the WHERE criteria. We may try some hack solutions of replacing .(traces) with _(logs&metrics) and vice versa, but that is not reliable; for example http_status_code will be recorded as http.status_code on spans, not as http.status.code.

[makeavish]

Also, attributes are sanitized in metrics and logs. Currently, attributes are not sanitized in traces so attributes are inconsistent and will cause issues with correlation.
Adding this comment as a reminder for future.