[25.0] [Tenant Media Cleanup] Only delete if filter is not empty (#2123)

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#### Summary <!-- Provide a general summary of your changes -->
**Problem**
When any of the sublists returned by `SplitListIntoSubLists` are empty,
then the filter set on `Tenant Media` and `Tenant Media Set` is empty,
causing all media to be deleted.

**Solution**
Only delete `Tenant Media` and `Tenant Media Set` when a filter is set
on the record.

#### Work Item(s) <!-- Add the issue number here after the #. The issue
needs to be open and approved. Submitting PRs with no linked issues or
unapproved issues is highly discouraged. -->
Fixes
[AB#550959](https://dynamicssmb2.visualstudio.com/Dynamics%20SMB/_workitems/edit/550959)

src/System Application/App/Data Administration/src/MediaCleanupImpl.Codeunit.al

@@ -165,16 +165,20 @@ codeunit 1928 "Media Cleanup Impl."
         SplitList: List of [List of [Guid]];
         MediaSetOrphans: List of [Guid];
         MediaOrphanSubList: List of [Guid];
+        TenantMediaFilter: Text;
     begin
         if not TenantMediaSet.WritePermission() then
             exit;
 
         MediaSetOrphans := MediaSet.FindOrphans();
         SplitListIntoSubLists(MediaSetOrphans, 10, SplitList);
         foreach MediaOrphanSubList in SplitList do begin
-            TenantMediaSet.SetFilter(ID, CreateOrFilter(MediaOrphanSubList));
-            TenantMediaSet.DeleteAll();
-            Commit(); // Ensure we keep the progress even on timeout (in case of large amounts of detached media).
+            TenantMediaFilter := CreateOrFilter(MediaOrphanSubList);
+            if TenantMediaFilter <> '' then begin
+                TenantMediaSet.SetFilter(ID, TenantMediaFilter);
+                TenantMediaSet.DeleteAll();
+                Commit(); // Ensure we keep the progress even on timeout (in case of large amounts of detached media).
+            end;
         end;
     end;
 
@@ -185,16 +189,20 @@ codeunit 1928 "Media Cleanup Impl."
         SplitList: List of [List of [Guid]];
         MediaOrphans: List of [Guid];
         MediaOrphanSubList: List of [Guid];
+        TenantMediaFilter: Text;
     begin
         if not TenantMedia.WritePermission() then
             exit;
 
         MediaOrphans := Media.FindOrphans();
         SplitListIntoSubLists(MediaOrphans, 100, SplitList);
         foreach MediaOrphanSubList in SplitList do begin
-            TenantMedia.SetFilter(ID, CreateOrFilter(MediaOrphanSubList));
-            TenantMedia.DeleteAll();
-            Commit(); // Ensure we keep the progress even on timeout (in case of large amounts of detached media).
+            TenantMediaFilter := CreateOrFilter(MediaOrphanSubList);
+            if TenantMediaFilter <> '' then begin
+                TenantMedia.SetFilter(ID, TenantMediaFilter);
+                TenantMedia.DeleteAll();
+                Commit(); // Ensure we keep the progress even on timeout (in case of large amounts of detached media).
+            end;
         end;
     end;