Fix visits counts not being deleted when deleting short URL or orphan visits #1525

Job	Run time
static-analysis (8.3, cs)	45s
static-analysis (8.3, stan)	37s
static-analysis (8.3, swagger:validate)	25s
api-tests / tests (8.2)	1m 15s
api-tests / tests (8.3)	1m 13s
cli-tests / tests (8.2)	1m 2s
unit-tests / tests (8.2)	35s
api-tests / tests (8.4)	1m 11s
cli-tests / tests (8.3)	44s
unit-tests / tests (8.3)	39s
cli-tests / tests (8.4)	35s
unit-tests / tests (8.4)	30s
db-tests (maria) / db-tests (8.2)	32s
db-tests (ms) / db-tests (8.2)	59s
db-tests (mysql) / db-tests (8.2)	36s
db-tests (postgres) / db-tests (8.2)	23s
db-tests (maria) / db-tests (8.3)	25s
db-tests (mysql) / db-tests (8.3)	1m 0s
db-tests (postgres) / db-tests (8.3)	30s
db-tests (ms) / db-tests (8.3)	1m 3s
db-tests (mysql) / db-tests (8.4)	41s
db-tests (ms) / db-tests (8.4)	59s
db-tests (maria) / db-tests (8.4)	33s
db-tests (postgres) / db-tests (8.4)	36s
db-tests (sqlite:ci) / db-tests (8.2)	32s
db-tests (sqlite:ci) / db-tests (8.3)	45s
db-tests (sqlite:ci) / db-tests (8.4)	28s
upload-coverage (8.3)	22s
delete-artifacts	3s
	19m 58s

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