What (a) total number of (i) posts for the treatment of COVID-19 were provided to the Chris Hani Baragwanath Hospital, (ii) extra community service doctors were provided to the hospital since the outbreak of the COVID-19 pandemic and (iii) community service doctors will be incorporated into the hospital and (b) is the impact of the reduction of the COVID-19 grants on posts for the treatment of the COVID-19 pandemic at the hospital?