Add unit tests #1059

Job	Run time
collect_kubernetes_versions	5s
test-extended-installation	4m 48s
thirdparties_sync	59s
test-default-installation (v1.23.1)	4m 7s
test-default-installation (v1.23.11)	4m 30s
test-default-installation (v1.23.17)	4m 6s
test-default-installation (v1.23.6)	4m 39s
test-default-installation (v1.24.11)	3m 53s
test-default-installation (v1.24.2)	4m 21s
test-default-installation (v1.25.2)	3m 51s
test-default-installation (v1.25.7)	4m 1s
test-default-installation (v1.26.11)	4m 13s
test-default-installation (v1.26.3)	4m 22s
test-default-installation (v1.26.4)	4m 16s
test-default-installation (v1.26.7)	4m 27s
test-default-installation (v1.27.1)	4m 22s
test-default-installation (v1.27.4)	4m 33s
test-default-installation (v1.27.8)	4m 0s
test-default-installation (v1.28.0)	4m 19s
test-default-installation (v1.28.3)	4m 20s
test-default-installation (v1.28.4)	4m 27s
	1h 22m 39s

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