Clear cron errors on change of background job mode
Clear cron errors on change of background job mode

* fixes #18454

michaelletzgus/nextcloud-server,jbicha/server,cernbox/core,pollopolea/core,bluelml/core,nextcloud/server,jbicha/server,jbicha/server,whitekiba/server,xx621998xx/server,lrytz/core,IljaN/core,nextcloud/server,andreas-p/nextcloud-server,bluelml/core,pixelipo/server,Ardinis/server,pollopolea/core,IljaN/core,bluelml/core,whitekiba/server,xx621998xx/server,lrytz/core,sharidas/core,endsguy/server,nextcloud/server,whitekiba/server,jbicha/server,pmattern/server,pixelipo/server,pollopolea/core,IljaN/core,xx621998xx/server,pixelipo/server,owncloud/core,owncloud/core,sharidas/core,Ardinis/server,endsguy/server,pmattern/server,cernbox/core,pmattern/server,sharidas/core,andreas-p/nextcloud-server,cernbox/core,whitekiba/server,michaelletzgus/nextcloud-server,Ardinis/server,IljaN/core,andreas-p/nextcloud-server,owncloud/core,endsguy/server,pixelipo/server,nextcloud/server,owncloud/core,bluelml/core,whitekiba/server,pmattern/server,jbicha/server,lrytz/core,cernbox/core,pixelipo/server,bluelml/core,endsguy/server,endsguy/server,xx621998xx/server,michaelletzgus/nextcloud-server,andreas-p/nextcloud-server,lrytz/core,cernbox/core,michaelletzgus/nextcloud-server,phil-davis/core,lrytz/core,sharidas/core,Ardinis/server,andreas-p/nextcloud-server,sharidas/core,xx621998xx/server,IljaN/core,pmattern/server,owncloud/core,Ardinis/server,pollopolea/core,pollopolea/core