Merged PR 3605: Beautification of Reporting String values

# Description

Creates a macro for beautification of categorical values.

# 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

macros/business_kpis_configuration.sql

@@ -20,6 +20,10 @@ It provides a proper display name for reporting purposes.
     {{ return(dimensions) }}
 {% endmacro %}
 
+{% macro capitalise_and_remove_underscores(field_name) %}
+    initcap(regexp_replace({{ field_name }}, '_', ' ', 'g'))
+{% endmacro %}
+
 /*
 The following lines specify for each dimension the field to be used in a 
 standalone macro.