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/backup_detail.sql

@@ -0,0 +1,33 @@
+declare @condition tinyint;
+SET @condition = 24;
+
+select
+d.database_id as [Database ID],
+d.name as [Database],
+d.recovery_model_desc as [Recovery model],
+d.state_desc as [Database state],
+case
+    when b.type = N'D' then N'Database'
+    when b.type = N'I' then N'Differential Database'
+    when b.type = N'L' then N'Log' 
+    when b.type = N'F' then N'File or Filegroup'
+    when b.type = N'G' then N'Differental File'
+    when b.type = N'P' then N'Partial'
+    when b.type = N'Q' then N'Differential Partial'
+    else NULL
+    end
+as [Backup type],
+b.backup_start_date as [Backup start date],
+b.backup_finish_date as [Backup finish date],
+case
+    when m.last_backup_time is null then 0 --N'No backup found'
+    when datediff(hh, m.last_backup_time, getdate()) > @condition then 1 -- N'Older than 24hrs'
+    else 2 --N'Within 24hrs' 
+    end as [Backup_Health]
+from sys.databases as d
+left join msdb..backupset as b on d.name = b.database_name
+left join (select bs.database_name, max(bs.backup_start_date) as last_backup_time
+        from msdb..backupset as bs
+        group by bs.database_name ) as m  on d.name = m.database_name  and b.backup_start_date = m.last_backup_time
+where b.backup_start_date is null or b.backup_start_date = m.last_backup_time
+order by d.database_id asc