Tests

enable services to start on system start #752

Job	Run time
Check libraries	35s
Unit tests	2m 51s
Lint	15s
Build charms / Get workflow version / Get workflow version	6s
Build charms / Collect charms	16s
Build charms / Build mongodb charm \| 22.04	3m 2s
Build charms / Build application charm \| 20.04	2m 11s
charm-integration	12m 7s
ha-integration	51m 7s
relation-integration	22m 18s
legacy-integration	4m 39s
tls-integration	23m 6s
backup-integration	1h 0m 53s
metric-integration	19m 24s
	3h 22m 50s

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