Revert "Merged PR 3430: Weekly aggregated guest journey metrics

# Description

Here I created a weekly aggregated model for guest journey metrics.
I changed the daily_dimension week start and end to iso so it matches the week date obtained by Postgres for this aggregation

# Checklist

- [x] The edited models and dependants run properly with production data.
- [x] The edited models are sufficiently documented.
- [x] The edited models contain PK tests, and I've ran and passed them.
- [x] I have checked for DRY opportunities with other models and docs.
- [x] I've picked the right materialization for the affected models.

# Other

- [ ] Check if a full-refresh is required after this PR is merged.

Related work items: #23373"

models/intermediate/kpis/int_kpis__dimension_dates.sql

@@ -13,8 +13,8 @@ with
             id.date_day as date,
             id.month_start_date as first_day_month,
             id.month_end_date as last_day_month,
-            id.iso_week_start_date as first_day_week,
-            id.iso_week_end_date as last_day_week,
+            id.week_start_date as first_day_week,
+            id.week_end_date as last_day_week,
             now()::date as today
         from int_dates id
     )