K8SPG-864: add `sidecarPVCs` and `sidecarVolumes` #5433

Job	Run time
runner / suggester / golangci-lint	3m 0s
runner / misspell	34s
runner / suggester / goimports-reviser	26s
runner / shellcheck	13s
runner / suggester / shfmt	19s
runner / alex	43s
runner / suggester / gofmt	10s
runner / manifests	2m 4s
	7m 29s

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