Tests

Update canonical/charming-actions action to v2.6.3 #1520

Job	Run time
Unit test charm	1m 4s
promtool	15s
Lint	31s
Check libraries	26s
Terraform - Lint and Simple Deployment	12m 58s
Build charm (.) / Collect platforms for charm \| .	17s
Build charm (tests/integration/application-charm) / Collect platforms for charm \| tests/integration/application-charm	19s
Build charm (.) / Build charm \| [email protected]:amd64	3m 8s
Build charm (tests/integration/application-charm) / Build charm \| [email protected]:amd64	3m 5s
Integration test charm / 3.6.1 \| amd64 \| Collect integration test groups	26s
Integration test charm / ha/test_network_cut.py \| group 1	1h 47m 56s
Integration test charm / ha/test_scaling.py \| group 1	30m 19s
Integration test charm / spaces/test_wrong_etc_hosts.py \| group 1	23m 24s
Integration test charm / test_charm.py \| group 1	1h 4m 54s
Integration test charm / test_upgrade.py \| group 1	44m 7s
Integration test charm / (beta) Publish Allure report	0s
	4h 53m 9s

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