mgr/dashboard: Pool read/write OPS shows too many decimal places

mgr/dashboard: Pool read/write OPS shows too many decimal places
Fixes: https://tracker.ceph.com/issues/39714
Signed-off-by: anurag <anurag@localhost.localdomain>
(cherry picked from commit 27a2bbb12614b7aba0561c027346d9b5427f2405)
Signed-off-by: Ernesto Puerta <epuertat@redhat.com>
Conflicts:
        src/pybind/mgr/dashboard/frontend/src/app/shared/datatable/table/table.component.spec.ts,
        src/pybind/mgr/dashboard/frontend/src/app/shared/datatable/table/table-key-value/table-key-value.component.spec.ts:
    added import of PipesModule to Angular unit tests

Signed-off-by: Ernesto Puerta <epuertat@redhat.com>