fix(sinks): confinement follow-ups from #25820 codex review #60873

Job	Run time
changes	-1s
K8s E2E Suite	2s
Build - x86_64-unknown-linux-gnu	-1s
K8s ${{ matrix.kubernetes_version.version }} / ${{ matrix.container_runtime }} (${{ matrix.kubernetes_version.role }})	-1s
Compute K8s test plan	-7s
	-8s

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