What number of cases of assault with the intent to do grievous bodily harm by (a) learners on educators and support staff, (b) educators and support staff on learners, (c) educators on educators, (d) support staff on support staff, (e) support staff on educators and (f) educators on support staff have been reported in each (i) district and (ii) province (aa) in the past three academic years and (bb) since 1 January 2018?