ci(integrate): use charmcraft from latest/candidate #1118

Job	Run time
Publish Charm / Generate the Charm Matrix	2s
Run Tests / Observability Integration Test (1.25-strict/stable)	56m 57s
Run Tests / Integration Test (1.25-strict/stable, integration)	1h 4m 34s
Run Tests / Observability Integration Test (1.26-strict/stable)	58m 37s
Run Tests / Lint Code (pilot)	55s
Run Tests / Integration Test (1.25-strict/stable, integration-tls-provider)	55m 19s
Run Tests / Integration Test (1.25-strict/stable, integration-tls-secret)	54m 21s
Run Tests / Unit Test (pilot)	40s
Run Tests / Integration Test (1.26-strict/stable, integration)	1h 11m 46s
Run Tests / Lint Code (gateway)	23s
Run Tests / Unit Test (gateway)	1m 11s
Run Tests / Integration Test (1.26-strict/stable, integration-tls-provider)	53m 49s
Run Tests / Integration Test (1.26-strict/stable, integration-tls-secret)	56m 52s
Run Tests / Check libraries (istio-gateway) / Check libraries	4s
Run Tests / Check libraries (istio-gateway) / Lint	17s
Run Tests / Check libraries (istio-pilot) / Check libraries	28s
Run Tests / Check libraries (istio-pilot) / Lint	20s
Publish Charm / Publish Charm (./charms/istio-pilot)	42m 31s
Publish Charm / Publish Charm (./charms/istio-gateway)	15m 43s
	8h 54m 49s

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