Tests

Update release.yaml to run on merge to branch (6/edge) #909

Job	Run time
Unit tests	2m 42s
Check libraries	30s
Lint	19s
Build charms / Get workflow version / Get workflow version	4s
Build charms / Collect charms	17s
Build charms / Build mongodb charm \| 22.04	2m 41s
Build charms / Build application charm \| 20.04	2m 10s
charm-integration	12m 9s
ha-integration	50m 8s
relation-integration	20m 54s
legacy-integration	4m 30s
tls-integration	24m 38s
backup-integration	1h 7m 24s
metric-integration	19m 34s
	3h 28m 0s

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