Tests

Update GitHub actions (major) - autoclosed #1235

Job	Run time
Unit tests	33s
Lint	20s
Build charms / Get workflow version / Get workflow version	3s
Build charms / Collect charms	10s
Build charms / Build pgbouncer-k8s charm \| base #0	7m 20s
backend-integration \| 2.9.45	4m 26s
backend-integration \| 3.1.6	4m 31s
client-relation-integration \| 2.9.45	4m 28s
client-relation-integration \| 3.1.6	5m 20s
scaling-integration \| 2.9.45	4m 21s
scaling-integration \| 3.1.6	4m 38s
tls-integration \| 2.9.45	5m 3s
tls-integration \| 3.1.6	4m 24s
standalone-integration \| 2.9.45	4m 59s
standalone-integration \| 3.1.6	4m 18s
legacy-client-relation-integration \| 2.9.45	5m 2s
legacy-client-relation-integration \| 3.1.6	4m 30s
upgrade-integration \| 2.9.45	4m 23s
upgrade-integration \| 3.1.6	5m 16s
	1h 14m 5s

Provide feedback