Improve WordPress's observability and increase health check timeout #811

Job	Run time
Integration Test / Get runner image / Get runner image	3s
Integration Test / Build and push charm	2m 24s
Integration Test / Build image / Get images	2s
Integration Test / Build rock / Get rocks	4s
Integration Test / Build image / Build image	0s
Integration Test / Build rock / Build rock (wordpress_rock)	9m 7s
Integration Test / Get rocks or Docker images	1s
Integration Test / Integration tests / Integration tests (test_addon)	15m 39s
Integration Test / Integration tests / Integration tests (test_core)	11m 43s
Integration Test / Integration tests / Integration tests (test_external)	12m 22s
Integration Test / Integration tests / Integration tests (test_ingress)	14m 45s
Integration Test / Integration tests / Integration tests (test_cos_grafana)	11m 28s
Integration Test / Integration tests / Integration tests (test_cos_loki)	14m 40s
Integration Test / Integration tests / Integration tests (test_cos_prometheus)	11m 14s
Integration Test / Required Integration Test Status Checks	2s
	1h 43m 34s

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