K8SPG-901: allow running without pgbouncer #5450

Job	Run time
runner / suggester / golangci-lint	2m 14s
runner / suggester / shfmt	16s
runner / misspell	21s
runner / manifests	1m 43s
runner / alex	35s
runner / suggester / goimports-reviser	21s
runner / shellcheck	9s
runner / suggester / gofmt	8s
	5m 47s

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