Fix error displayed when insights files can't be found and fix server-report insights in dev build (#18635)

* Fix error

* fix queries

extensions/server-report/sql/all_db_space_used.sql

@@ -0,0 +1,103 @@
+--Source: https://gallery.technet.microsoft.com/scriptcenter/All-Databases-Data-log-a36da95d
+-- Use for a demo/sample purpose only. This query is not built-in to any product.
+
+------------------------------Data file size----------------------------
+declare @dbsize table
+(Dbname nvarchar(128),
+    file_Size_MB decimal(20,2)default (0),
+    Space_Used_MB decimal(20,2)default (0),
+    Free_Space_MB decimal(20,2) default (0))
+insert into @dbsize
+    (Dbname,file_Size_MB,Space_Used_MB,Free_Space_MB)
+exec sp_MSforeachdb
+'use [?];
+  select DB_NAME() AS DbName,
+sum(size)/128.0 AS File_Size_MB,
+sum(CAST(FILEPROPERTY(name, ''SpaceUsed'') AS INT))/128.0 as Space_Used_MB,
+SUM( size)/128.0 - sum(CAST(FILEPROPERTY(name,''SpaceUsed'') AS INT))/128.0 AS Free_Space_MB
+from sys.database_files  where type=0 group by type'
+-------------------log size--------------------------------------
+declare @logsize table
+(Dbname nvarchar(128),
+    Log_File_Size_MB decimal(20,2)default (0),
+    log_Space_Used_MB decimal(20,2)default (0),
+    log_Free_Space_MB decimal(20,2)default (0))
+insert into @logsize
+    (Dbname,Log_File_Size_MB,log_Space_Used_MB,log_Free_Space_MB)
+exec sp_MSforeachdb
+'use [?];
+  select DB_NAME() AS DbName,
+sum(size)/128.0 AS Log_File_Size_MB,
+sum(CAST(FILEPROPERTY(name, ''SpaceUsed'') AS INT))/128.0 as log_Space_Used_MB,
+SUM( size)/128.0 - sum(CAST(FILEPROPERTY(name,''SpaceUsed'') AS INT))/128.0 AS log_Free_Space_MB
+from sys.database_files  where type=1 group by type'
+--------------------------------database free size
+declare @dbfreesize table
+(name nvarchar(128),
+    database_size varchar(50),
+    Freespace varchar(50)default (0.00))
+insert into @dbfreesize
+    (name,database_size,Freespace)
+exec sp_MSforeachdb
+'use [?];SELECT database_name = db_name()
+    ,database_size = ltrim(str((convert(DECIMAL(15, 2), dbsize) + convert(DECIMAL(15, 2), logsize)) * 8192 / 1048576, 15, 2) + ''MB'')
+    ,''unallocated space'' = ltrim(str((
+                CASE
+                    WHEN dbsize >= reservedpages
+                        THEN (convert(DECIMAL(15, 2), dbsize) - convert(DECIMAL(15, 2), reservedpages)) * 8192 / 1048576
+                    ELSE 0
+                    END
+                ), 15, 2) + '' MB'')
+FROM (
+    SELECT dbsize = sum(convert(BIGINT, CASE
+                    WHEN type = 0
+                        THEN size
+                    ELSE 0
+                    END))
+        ,logsize = sum(convert(BIGINT, CASE
+                    WHEN type <> 0
+                        THEN size
+                    ELSE 0
+                    END))
+    FROM sys.database_files
+) AS files
+,(
+    SELECT reservedpages = sum(a.total_pages)
+        ,usedpages = sum(a.used_pages)
+        ,pages = sum(CASE
+                WHEN it.internal_type IN (
+                        202
+                        ,204
+                        ,211
+                        ,212
+                        ,213
+                        ,214
+                        ,215
+                        ,216
+                        )
+                    THEN 0
+                WHEN a.type <> 1
+                    THEN a.used_pages
+                WHEN p.index_id < 2
+                    THEN a.data_pages
+                ELSE 0
+                END)
+    FROM sys.partitions p
+    INNER JOIN sys.allocation_units a
+        ON p.partition_id = a.container_id
+    LEFT JOIN sys.internal_tables it
+        ON p.object_id = it.object_id
+) AS partitions'
+-----------------------------------
+select TOP 10
+    d.Dbname,
+    --(file_size_mb + log_file_size_mb) as DBsize,
+    --d.file_Size_MB,
+    d.Space_Used_MB,
+    --d.Free_Space_MB,
+    --l.Log_File_Size_MB,
+    l.log_Space_Used_MB--,
+    --l.log_Free_Space_MB,
+    --fs.Freespace as DB_Freespace
+from @dbsize d join @logsize l on d.Dbname=l.Dbname join @dbfreesize fs on d.Dbname=fs.name
+order by d.Space_Used_MB DESC