Merged PR 2648: Fixes int_dates_by_deal tests

# Description

Fixes int_dates_by_deal tests

# 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: #20318, #20319

models/intermediate/cross/schema.yml

@@ -268,17 +268,11 @@ models:
         tests:
           - not_null
 
-      - name: is_end_of_month
+      - name: last_day_month
-        data_type: boolean
+        data_type: date
-        description: Is end of month, 1 for yes, 0 for no.
-        tests:
-          - not_null
-
-      - name: is_current_month
-        data_type: boolean
         description: |
-          Checks if the date is within the current executed month, 
+          Last day of the month correspoding to the date field. 
-          1 for yes, 0 for no.
+          It comes from int_dates_mtd logic.
         tests:
           - not_null