Merged PR 4727: Bookings fees are now Old Dashboard Booking Fees in Main KPIs

# Description

Booking fees is widely used with different meanings, for old dash, for new dash, for both, etc. This is painful. First step to align on a proper naming is ensure that what we report in Main KPIs is clearly stated, which in this case, Booking Fees are now called Old Dashboard Booking Fees.

Changes:
* Modify `stg_seed__accounting_aggregations` seed to rename Booking Fees to Old Dashboard Booking Fees. This is for us to clarify. This is only applied for KPIs compute. I also added an empty space that I mistakenly forgot in the past for `financial_l3_aggregation`.
* Modify KPIs source, i.e., `int_kpis__metric_daily_invoiced_revenue`. Here I forcefully modify the name of the field to `xero_old_dashboard_booking_net_fees_in_gbp`.
* Propagate changes of downstream usages of `xero_booking_net_fees_in_gbp` to `xero_old_dashboard_booking_net_fees_in_gbp`. This affects all models, including the reporting model. On this one we still have both names to avoid breaking it. I will need to modify the data glossary in PBI anyway so I'll do this change as well.
* Modify displayed metric name from Booking Fees Revenue to Old Dashboard Booking Fees Revenue.
* Modify schema so it reflects the proper names, descriptions, and tests.
* Ensure outlier and completion tests still work after this change.

I confirm the field `xero_booking_net_fees_in_gbp` does not exist anymore in the rest of DWH after these changes, except for the abovementioned comment on the reporting line.

# 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: #28560

models/intermediate/cross/int_monthly_aggregated_metrics_history_by_deal.sql

@@ -154,7 +154,7 @@ select
 
     -- HOST (OPERATOR) REVENUE --
     -- OLD DASH --
-    invoiced_revenue.xero_booking_net_fees_in_gbp,
+    invoiced_revenue.xero_old_dashboard_booking_net_fees_in_gbp,
     invoiced_revenue.xero_listing_net_fees_in_gbp,
     invoiced_revenue.xero_verification_net_fees_in_gbp,
     -- NEW DASH --

models/intermediate/cross/int_mtd_aggregated_metrics.sql

@@ -424,10 +424,10 @@
     },
     {
         "order_by": 225,
-        "metric": "Invoiced Booking Fees Revenue",
-        "value": "xero_booking_net_fees_in_gbp",
-        "previous_year_value": "previous_year_xero_booking_net_fees_in_gbp",
-        "relative_increment": "relative_increment_xero_booking_net_fees_in_gbp",
+        "metric": "Invoiced Old Dashboard Booking Fees Revenue",
+        "value": "xero_old_dashboard_booking_net_fees_in_gbp",
+        "previous_year_value": "previous_year_xero_old_dashboard_booking_net_fees_in_gbp",
+        "relative_increment": "relative_increment_xero_old_dashboard_booking_net_fees_in_gbp",
         "number_format": "currency_gbp",
         "increment_sign_format": "positive",
     },

models/intermediate/cross/int_mtd_vs_previous_year_metrics.sql

@@ -240,7 +240,7 @@ with
 
             -- HOST (OPERATOR) REVENUE --
             -- OLD DASH --
-            invoiced_revenue.xero_booking_net_fees_in_gbp,
+            invoiced_revenue.xero_old_dashboard_booking_net_fees_in_gbp,
             invoiced_revenue.xero_listing_net_fees_in_gbp,
             invoiced_revenue.xero_verification_net_fees_in_gbp,
             -- NEW DASH --
@@ -521,7 +521,7 @@ select
 
     -- HOST (OPERATOR) REVENUE --
     -- OLD DASH --
-    {{ calculate_safe_relative_increment("xero_booking_net_fees_in_gbp") }},
+    {{ calculate_safe_relative_increment("xero_old_dashboard_booking_net_fees_in_gbp") }},
     {{ calculate_safe_relative_increment("xero_listing_net_fees_in_gbp") }},
     {{ calculate_safe_relative_increment("xero_verification_net_fees_in_gbp") }},
     -- NEW DASH --