Add feature-flag "enable-kubernetes-sidecar"

[say5]

Feature request

Add feature-flag enable-kubernetes-sidecar to operator.

Use case

Tekton pipelines controller supports flag enable-kubernetes-sidecar would be great to be able to control it using operator.

[PuneetPunamiya]

Yep thanks for reporting the issue and apologies for late reply, as of today we can still add it through options

options:
      configMaps:
        feature-flags:
          data:
            enable-kubernetes-sidecar: "true"