Merged PR 3667: Creates Chargeable metrics for New Dash KPIs

# Description

Creates the models for KPIs for New Dash - Chargeable metrics. In essence, computes 4 metrics:
- Chargeable Services
- Chargeable Amount (in GBP)
- Chargeable Bookings (unique over a time period and dimension, not additive)
- Chargeable Listings (unique over a time period and dimension, not additive)

This is done by creating:
- A Weekly Metric and Monthly Metric model. Here we keep the granularity of id_booking / id_accommodation to be able to compute the uniqueness.
- A Daily, Weekly and Monthly Aggregated models. Same as usual.
- Integrates everything to the existing model for Product New Dash Agg Metrics
- Exposes everything into reporting

NB: I removed on "by_host" in Created Services - I forgot to clear it out.

# 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: #20809

models/reporting/kpis/schema.yml

@@ -303,6 +303,7 @@ models:
                 - "By New Dash Version"
                 - "By Has Upgraded Service"
                 - "By Service"
+                - "By Service Business Type"
 
       - name: dimension_value
         data_type: string
@@ -312,12 +313,43 @@ models:
 
       - name: created_services
         data_type: bigint
-        description: The daily created services for a given date, dimension and value.
+        description: |
+          The created services for a given time granularity, date or dates range, 
+          dimension and value.
 
       - name: booking_with_created_services_count
         data_type: bigint
         description: |
-          The daily bookings with created services for a given date, dimension and value.
+          The bookings with created services for a given time granularity, date or 
+          dates range, dimension and value.
           This is an approximation to booking count since different services can 
           apply to the same booking and these do not need to be created in the same
           time period. Therefore, it's not an additive metric.
+
+      - name: total_chargeable_services
+        data_type: integer
+        description: |
+          The total chargeable services for a given time granularity, date or 
+          dates range, dimension and value.
+
+      - name: total_chargeable_amount_in_gbp
+        data_type: decimal
+        description: |
+          The total daily chargeable amount for a given time granularity, date or 
+          dates range, dimension and value, in GBP.
+
+      - name: unique_chargeable_bookings
+        data_type: integer
+        description: |
+          The unique daily chargeable bookings for a given time granularity, date or 
+          dates range, dimension and value. 
+          This metric is not additive, and its value can vary depending on the time 
+          period considered.
+
+      - name: unique_chargeable_listings
+        data_type: integer
+        description: |
+          The unique daily chargeable accommodations, or listings, for a given time 
+          granularity, date or dates range, dimension and value. 
+          This metric is not additive, and its value can vary depending on the time 
+          period considered.