[DSpace 8 Admin Reports] Performance issues caused by large page sizes.

[pilasou]

DSpace 8 reports offer to the user the capacity to set large page size for results (between 10 and 1000) that can cause performance issue (See PR https://github.com/DSpace/dspace-angular/pull/2163#pullrequestreview-1906824687).

The 1,000 option should be removed (and perhaps 250 as well). Page sizes limit may 100 or less. The DEFAULT value may be set to 10. (It appears the current default is 100...which also responds very slowly for me.)