Merged PR 3286: Rename of categories for top losers/winners

# Description

Re-aligned namings with Matt and Alex. This PR just changes the top losers, losers, winners and top winners to major decline, decline, gain and major gain respectively

# 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.
- [NA] I have checked for DRY opportunities with other models and docs.
- [NA] I've picked the right materialization for the affected models.

# Other

- [ ] Check if a full-refresh is required after this PR is merged.

Rename of categories for top losers/winners

Related work items: #23170

models/intermediate/cross/int_monthly_growth_score_by_deal.sql

@@ -407,15 +407,15 @@ select
     -- opinionated
     case
         when gsc.weighted_avg_growth_score <= -1.0
-        then 'TOP LOSER'
+        then 'MAJOR DECLINE'
         when gsc.weighted_avg_growth_score > -1.0 and gsc.weighted_avg_growth_score < 0
-        then 'LOSER'
+        then 'DECLINE'
         when gsc.weighted_avg_growth_score = 0
         then 'FLAT'
         when gsc.weighted_avg_growth_score > 0 and gsc.weighted_avg_growth_score < 1.0
-        then 'WINNER'
+        then 'GAIN'
         when gsc.weighted_avg_growth_score >= 1.0
-        then 'TOP WINNER'
+        then 'MAJOR GAIN'
         else 'UNSET'
     end as categorisation_weighted_avg_growth_score
 from growth_score_computation gsc

models/intermediate/cross/schema.yml

@@ -1231,11 +1231,11 @@ models:
           - not_null
           - accepted_values:
               values:
-                - TOP LOSER
-                - LOSER
+                - MAJOR DECLINE
+                - DECLINE
                 - FLAT
-                - WINNER
-                - TOP WINNER
+                - GAIN
+                - MAJOR GAIN
                 - UNSET
 
   - name: int_monthly_12m_window_contribution_by_deal

models/reporting/general/schema.yml

@@ -1156,9 +1156,9 @@ models:
           - not_null
           - accepted_values:
               values:
-                - TOP LOSER
-                - LOSER
+                - MAJOR DECLINE
+                - DECLINE
                 - FLAT
-                - WINNER
-                - TOP WINNER
+                - GAIN
+                - MAJOR GAIN
                 - UNSET