Change all uses of ImplicitRoleField to do on_delete=SET_NULL #9437

Job	Run time
awx-operator	12m 57s
awx-operator	14m 5s
awx_collection integration (a-h, ^[a-h])	12m 29s
awx_collection integration (a-h, ^[a-h])	12m 29s
awx_collection sanity	1m 3s
awx_collection sanity	1m 3s
awx_collection integration (i-p, ^[i-p])	16m 19s
awx_collection integration (i-p, ^[i-p])	16m 19s
api-test	10m 30s
api-test	10m 30s
awx_collection integration (r-z0-9, ^[r-z0-9])	14m 39s
awx_collection integration (r-z0-9, ^[r-z0-9])	14m 39s
dev-env	9m 55s
dev-env	9m 55s
api-migrations	11m 45s
api-migrations	11m 45s
api-lint	5m 53s
api-lint	5m 53s
api-swagger	7m 34s
api-swagger	7m 34s
awx-collection	6m 15s
awx-collection	6m 15s
api-schema	10m 8s
api-schema	10m 8s
ui-lint	6m 51s
ui-lint	6m 51s
ui-test-screens	12m 11s
ui-test-screens	12m 11s
ui-test-general	7m 59s
ui-test-general	7m 59s
combine awx_collection integration coverage	1m 6s
combine awx_collection integration coverage	1m 6s
	4h 56m 16s

Provide feedback