Merged PR 4757: Creates a Total Booking Fees metric (Old dash + New dash)

# Description

Main Changes:
* Computes the total booking fees in `int_kpis__metric_daily_invoiced_revenue`
* Propagates within KPIs, including schema and tests
* Propagates within cross in both "by deal" and "by dimension/global"
* Propagates to main kpis tests

Small fix:
* In `int_mtd_vs_previous_year_metrics`, manual formatting because sqlfmt is broken on this model...

# 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_mtd_aggregated_metrics.sql

@@ -422,6 +422,15 @@
         "number_format": "currency_gbp",
         "increment_sign_format": "positive",
     },
+    {
+        "order_by": 224,
+        "metric": "Invoiced Total 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",
+        "number_format": "currency_gbp",
+        "increment_sign_format": "positive",
+    },
     {
         "order_by": 225,
         "metric": "Invoiced Old Dashboard Booking Fees Revenue",