Inject TagRepository in TagService, instead of getting it from EntityManager #1488

Job	Run time
static-analysis (8.3, cs)	45s
static-analysis (8.3, stan)	29s
static-analysis (8.3, swagger:validate)	27s
api-tests / tests (8.2)	1m 39s
unit-tests / tests (8.2)	27s
api-tests / tests (8.3)	1m 13s
cli-tests / tests (8.2)	1m 32s
api-tests / tests (8.4)	1m 13s
cli-tests / tests (8.3)	34s
unit-tests / tests (8.3)	27s
unit-tests / tests (8.4)	36s
cli-tests / tests (8.4)	44s
db-tests (maria) / db-tests (8.2)	22s
db-tests (maria) / db-tests (8.3)	57s
db-tests (ms) / db-tests (8.2)	51s
db-tests (maria) / db-tests (8.4)	23s
db-tests (ms) / db-tests (8.3)	4m 10s
db-tests (mysql) / db-tests (8.2)	32s
db-tests (postgres) / db-tests (8.2)	29s
db-tests (ms) / db-tests (8.4)	47s
db-tests (mysql) / db-tests (8.3)	46s
db-tests (postgres) / db-tests (8.3)	20s
db-tests (mysql) / db-tests (8.4)	28s
db-tests (postgres) / db-tests (8.4)	27s
db-tests (sqlite:ci) / db-tests (8.2)	19s
db-tests (sqlite:ci) / db-tests (8.3)	35s
db-tests (sqlite:ci) / db-tests (8.4)	24s
upload-coverage (8.3)	31s
delete-artifacts	4s
	22m 31s

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