feat: trace v3 data migration

[nityanandagohain]

• Fetches the count of traces and spans from signoz_index_v2 and signoz_spans for the timerange and compares them. Stops if count doesn't match.
• For each batch of traces it fetch the corresponding traces from signoz_spans, this is done because references are stored as links in the new table.
• The order by of signoz_spans is traceId. So we created a tmp table name tmp_signoz_spans