build: update Helm to v3.16.4 and kubectl to v0.31.3 #596

Job	Run time
Build & Test	3m 36s
Integration Tests (v3.15.4)	1m 1s
helm install (ubuntu-latest, default, false, v3.15.4)	5s
Integration Tests (v3.16.4)	57s
helm install (ubuntu-latest, default, false, v3.16.4)	5s
helm install (macos-latest, default, false, v3.15.4)	10s
helm install (macos-latest, default, false, v3.16.4)	13s
helm install (windows-latest, default, false, v3.15.4)	16s
helm install (windows-latest, default, false, v3.16.4)	16s
helm install (windows-latest, wsl, false, v3.15.4)	1m 17s
helm install (windows-latest, cygwin, false, v3.15.4)	1m 13s
helm install (ubuntu-latest, sh, false, v3.15.4, alpine)	25s
helm install (windows-latest, wsl, false, v3.16.4)	1m 18s
helm install (windows-latest, cygwin, false, v3.16.4)	1m 42s
helm install (ubuntu-latest, sh, false, v3.16.4, alpine)	7s
	12m 41s

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