Add metabase_field semantic_type migration (#34664)

* Update migration and add test

Sets semantic_type to null for metabase_field if value was type/Number,
to avoid log warnings.

* Remove test for trivial migration as suggested

As migration tests are costly and change is trvial, it is better
to test small migration as one in question manually. Hence removing
the test.

resources/migrations/000_migrations.yaml

@@ -15363,6 +15363,20 @@ databaseChangeLog:
                   type: varchar(100)
                   remarks: 'Metabase version used to create the revision.'
+  - changeSet:
+      id: v48.00-026
+      author: lbrdnk
+      comment: Set semantic_type with value type/Number to null (#18754)
+      changes:
+        - update:
+            tableName: metabase_field
+            columns:
+              - column:
+                  name: semantic_type
+                  value: NULL
+            where: semantic_type = 'type/Number'
+      rollback:
+
   # >>>>>>>>>> DO NOT ADD NEW MIGRATIONS BELOW THIS LINE! ADD THEM ABOVE <<<<<<<<<<
 ########################################################################################################################