ci: Test more Kubernetes versions #142

Job	Run time
Integration test CLI	1m 10s
Check	6m 24s
Helm chart test	1m 19s
Integration test Kubernetes (1.21.14)	2m 25s
Unit test	1m 15s
Integration test Kubernetes (1.22.17)	2m 32s
Integration test Kubernetes (1.23.13)	2m 28s
Integration test Kubernetes (1.24.17)	2m 25s
Integration test Kubernetes (1.25.2)	2m 33s
Integration test Kubernetes (1.26.14)	2m 29s
Integration test Kubernetes (1.27.13)	2m 26s
Integration test Kubernetes (1.28.13)	2m 22s
Integration test Kubernetes (1.29.8)	2m 30s
Integration test Kubernetes (1.30.4)	2m 41s
Integration test Kubernetes (1.31.0)	2m 22s
Release images	0s
Tagged release binaries	0s
Tagged release images	0s
	37m 21s

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