chore(*): Fix scrollTo when scrolling to a merged cell that has larger rowspan.

Author: MKirova

projects/igniteui-angular/src/lib/grids/grid-base.directive.ts

@@ -7633,15 +7633,21 @@ export abstract class IgxGridBaseDirective implements GridType,
                 this.page = page;
             }
         }
-
+        let targetRowIndex = (typeof (row) === 'number' ? row : this.unpinnedDataView.indexOf(row));
+        const virtRec = this.verticalScrollContainer.igxForOf[targetRowIndex];
+        const col = typeof (column) === 'number' ? this.visibleColumns[column] : column;
+        const rowSpan = this.isRecordMerged(virtRec) ? virtRec?.cellMergeMeta.get(col)?.rowSpan : 1;
+       if (rowSpan > 1) {
+            targetRowIndex += Math.floor(rowSpan/2);
+       }
         if (delayScrolling) {
             this.verticalScrollContainer.dataChanged.pipe(first(), takeUntil(this.destroy$)).subscribe(() => {
                 this.scrollDirective(this.verticalScrollContainer,
-                    typeof (row) === 'number' ? row : this.unpinnedDataView.indexOf(row));
+                    targetRowIndex);
             });
         } else {
             this.scrollDirective(this.verticalScrollContainer,
-                typeof (row) === 'number' ? row : this.unpinnedDataView.indexOf(row));
+                targetRowIndex);
         }
 
         this.scrollToHorizontally(column);