renatovassaomb

Feat: Add support for stickiness for primary deployment in Istio

2

## Summary Adding support to configure [stickiness for primary deployment](https://docs.flagger.app/usage/deployment-strategies#configuring-stickiness-for-primary-deployment) for Istio Provider. Currently the implementation is only available for Gateway API provider. ## Changes - Adds `primarySessionAffinityCookie` field to...