K8SPG-915: add leader election options to `operator.yaml` #5423

Job	Run time
runner / manifests	2m 4s
runner / shellcheck	11s
runner / suggester / goimports-reviser	22s
runner / misspell	23s
runner / alex	34s
runner / suggester / shfmt	9s
runner / suggester / gofmt	9s
runner / suggester / golangci-lint	2m 58s
	6m 50s

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