Add istio control plane dashboard and alert rule #1105

Job	Run time
Run Tests / Observability Integration Test (1.25-strict/stable)	1h 5m 26s
Publish Charm / Generate the Charm Matrix	3s
Run Tests / Observability Integration Test (1.26-strict/stable)	1h 5m 37s
Run Tests / Integration Test (1.27-strict/stable, integration)	1h 8m 51s
Run Tests / Lint Code (pilot)	20s
Run Tests / Integration Test (1.27-strict/stable, integration-tls-provider)	1h 8m 31s
Run Tests / Lint Code (gateway)	33s
Run Tests / Integration Test (1.27-strict/stable, integration-tls-secret)	1h 5m 47s
Run Tests / Unit Test (pilot)	39s
Run Tests / Integration Test (1.30-strict/stable, integration)	1h 8m 51s
Run Tests / Integration Test (1.30-strict/stable, integration-tls-provider)	1h 8m 51s
Run Tests / Integration Test (1.30-strict/stable, integration-tls-secret)	1h 5m 1s
Run Tests / Unit Test (gateway)	32s
Run Tests / Check libraries (istio-gateway) / Check libraries	34s
Run Tests / Check libraries (istio-gateway) / Lint	9s
Run Tests / Check libraries (istio-pilot) / Check libraries	40s
Run Tests / Check libraries (istio-pilot) / Lint	11s
Publish Charm / Publish Charm (./charms/istio-gateway)	31m 21s
Publish Charm / Publish Charm (./charms/istio-pilot)	40m 42s
	10h 12m 39s

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