Merged PR 2422: Ensure that guest payments models follow nomenclature

Small refactor to follow up on last week's PR. We removed from the Guest Revenue models the host-takes-waiver aspect, thus these models are now only depending from Core. We just need to migrate it from cross to core.

One small detail as well, since we do not take into account at these models level the host-takes-waiver, technically, I would not call these models revenue but rather Guest Payments. This is why I also took the opportunity to apply this name.

Changes:
- `int_monthly_guest_revenue_by_deal` is now `int_core__monthly_guest_payments_history_by_deal`, and the location has changed from `intermediate.cross` to `intermediate.core`
- `int_mtd_guest_revenue_metrics` is now `int_core__mtd_guest_payments_metrics`, and the location has changed from `intermediate.cross` to `intermediate.core`
- Schema changes, moving these 2 models' documentation with the new naming from Cross to Core
- Provide continuity in following dependants: `int_mtd_vs_previous_year_metrics` and `int_monthly_aggregated_metrics_history_by_deal` now read from the 2 new models respectively. Additionally, the model alias has changed from `guest_revenue` to `guest_payments` to keep consistency.

This PR does not expose new metrics, but should keep the existing ones unaffected.

Related work items: #18914

models/intermediate/core/schema.yaml

@@ -272,6 +272,44 @@ models:
           - not_null
           - unique
 
+  - name: int_mtd_guest_payments_metrics
+    description: |
+      This model contains the historic information regarding the guest revenue in an aggregated manner. 
+      It's used for the business KPIs. Data is aggregated at the last day of the month and in the
+      days necessary for the Month-to-Date computation of the current month.
+
+    columns:
+      - name: date
+        data_type: date
+        description: The date for the month-to-date guest revenue-related metrics.
+        tests:
+          - not_null
+          - unique
+
+  - name: int_monthly_guest_payments_history_by_deal
+    description: |
+      This model contains the historic information regarding the guest revenue for each deal id. 
+      It's used for the business KPIs in the view by deal id. Data is aggregated at the last
+      day of the month, or up to yesterday if it's the current month.
+    tests: 
+      - dbt_utils.unique_combination_of_columns:
+          combination_of_columns:
+            - date
+            - id_deal
+
+    columns:
+      - name: date
+        data_type: date
+        description: The last day of the month or yesterday for historic guest revenue metrics.
+        tests:
+          - not_null
+
+      - name: id_deal
+        data_type: character varying
+        description: Id of the deal associated to the host. 
+        tests:
+          - not_null
+
   - name: int_core__verification_request_completeness
     description: |
       The `int_core__verification_request_completeness` model allows to determine if a verification request is