tests: run apt update when creating instances in behave #3059

Job	Run time
Check secrets / Check secret	1s
Packaging (xenial)	4m 3s
Packaging (bionic)	4m 0s
Packaging (focal)	3m 46s
Packaging (jammy)	5m 1s
Packaging (mantic)	3m 8s
Packaging (noble)	3m 47s
Integration (bionic, lxd-container, ubuntu-22.04)	1h 4m 51s
Integration (focal, lxd-container, ubuntu-22.04)	1h 11m 46s
Integration (jammy, lxd-container, ubuntu-22.04)	54m 25s
Integration (mantic, lxd-container, ubuntu-22.04)	33m 30s
Integration (xenial, lxd-container, ubuntu-20.04)	58m 20s
Integration (bionic, aws.pro, ubuntu-22.04)	42m 51s
Integration (bionic, gcp.pro, ubuntu-22.04)	50m 5s
Integration (bionic, aws.pro-fips, ubuntu-22.04)	15m 6s
	6h 54m 40s

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