ci: Test more Kubernetes versions #140

Job	Run time
Check	1m 34s
Integration test CLI	1m 12s
Helm chart test	1m 16s
Integration test Kubernetes (1.21.14)	2m 24s
Unit test	1m 15s
Integration test Kubernetes (1.22.17)	2m 27s
Integration test Kubernetes (1.23.13)	2m 23s
Integration test Kubernetes (1.24.17)	2m 26s
Integration test Kubernetes (1.25.2)	2m 28s
Integration test Kubernetes (1.26.14)	2m 28s
Integration test Kubernetes (1.27.13)	2m 27s
Integration test Kubernetes (1.28.13)	2m 24s
Integration test Kubernetes (1.29.8)	2m 25s
Integration test Kubernetes (1.30.4)	2m 22s
Integration test Kubernetes (1.31.0)	2m 27s
Release images	0s
Tagged release images	0s
Tagged release binaries	0s
	31m 58s

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