Reorganize assessment dashboard to increase readability (#738)

Closes #734 
<img width="1673" alt="image"
src="https://github.com/databrickslabs/ucx/assets/1122251/42e8eba8-9a89-4a20-958d-1209f51e542d">

Author: dmoore247

src/databricks/labs/ucx/queries/assessment/main/01_0_object_readiness.sql

@@ -1,5 +1,5 @@
 -- viz type=table, name=Object Type Readiness, columns=object_type,readiness
--- widget title=Readiness, row=1, col=0, size_x=1, size_y=8
+-- widget title=Readiness, row=1, col=0, size_x=2, size_y=8
 WITH raw AS (
   SELECT object_type, object_id, IF(failures == '[]', 1, 0) AS ready FROM $inventory.objects
 )

src/databricks/labs/ucx/queries/assessment/main/01_1_failure_summary.sql renamed to src/databricks/labs/ucx/queries/assessment/main/01_2_assessment_summary.sql

@@ -1,7 +1,7 @@
 -- viz type=table, name=Assessment Summary, search_by=failure, columns=failure,count
--- widget title=Assessment Summary, row=1, col=1, size_x=2, size_y=8
+-- widget title=Assessment Summary, row=1, col=2, size_x=4, size_y=8
 WITH raw AS (
   SELECT EXPLODE(FROM_JSON(failures, 'array<string>')) AS failure FROM $inventory.objects WHERE failures <> '[]'
 )
-SELECT failure, COUNT(*) AS count FROM raw GROUP BY failure
-ORDER BY count DESC, failure DESC
+SELECT failure as `item`, COUNT(*) AS count FROM raw GROUP BY failure
+ORDER BY count DESC, failure DESC

src/databricks/labs/ucx/queries/assessment/main/01_3_all_tables.sql renamed to src/databricks/labs/ucx/queries/assessment/main/03_0_all_tables.sql

@@ -1,5 +1,5 @@
 -- viz type=table, name=Table Types, search_by=name, columns=name,type,format,storage,is_delta,location
--- widget title=Table Types, row=1, col=3, size_x=3, size_y=8
+-- widget title=Table Types, row=4, col=0, size_x=6, size_y=8
 SELECT CONCAT(tables.`database`, '.', tables.name) AS name,
        object_type AS type,
        table_format AS format,