Fix Total Tables widget in assessment to only show table counts (#3738)

## Changes

Fix `Total Tables` widget in assessment dashboard by filtering out views

### Linked issues

Resolves #3252 

### Functionality

- [ ] fix dashboard widget

### Tests

- [x] manually tested

Author: pritishpai

src/databricks/labs/ucx/queries/assessment/main/00_3_count_total_tables.sql

@@ -1,4 +1,6 @@
 /* --title 'Total Tables' */
 SELECT
   COUNT(*) AS count_total_tables
-FROM inventory.tables
+FROM inventory.tables
+WHERE
+  object_type != 'VIEW'