Redshift web: Drop pv_upsert_limit in page_views cleanup step

[bill-warner]

The table {{.scratch_schema}}.pv_upsert_limit{{.entropy}} should be dropped as part of the step 99-page-views-cleanup.sql. Needs to be added.

[colmsnowplow]

Whenever we look at this, if we have the time to do it, we could go a step further and just roll the entire table update into a stored procedure like we do for Snowflake and BQ.