Merged PR 5311: Adds Confident Stay Revenue as a Main KPIs and Account Performance metric

# Description

Creates a new metric: Confident Stay Revenue.

This includes:
* Setting the computation in `int_mtd_vs_previous_year_metrics`
* Configuring the metric behavior in `int_mtd_aggregated_metrics`. It follows the same as CIH.
* Adding the metric in the completion test. I didn't add it in the outlier test in purpose as any new value would trigger the outlier since there's no history to compare against.

Few notes:
* I confirm it displays no value, as the product has not been launched.
* Note that the inclusion of Confident Stay in Guest Revenue was already handled in the previous PR.

Next steps to complete the ticket:
* Add in the Data Glossary of Main KPIs the definition of Confident Stay Revenue
* Add in the Data Glossary of Account Performance the definition of Confident Stay Revenue

# 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.
- [N/A] I have checked for DRY opportunities with other models and docs.
- [N/A] 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: #30278

tests/kpis_additive_metrics_per_dimension_are_consistent.sql

@@ -22,6 +22,7 @@ than the value reported in the Global dimension.
     "Check Out Bookings (Excl. Cancelled)",
     "Churning Deals",
     "Churning Listings",
+    "Confident Stay Revenue",
     "Created Bookings (Excl. Cancelled)",
     "Damage Waiver Payouts",
     "Deals Booked in 12 Months",