(This is used to request new product features, please visit https://github.com/istio/istio/discussions for questions on using Istio)

Describe the feature request

As an advancement, I'd like to add the ability to set either maxUnavailable or minAvailable on the PDB for istiod, allowing for a setup where I always only want just a certain number of pods for istiod to be unavailable.

One of the other will be set, by default use what is setup today, which is minAvailable of 1.

Describe alternatives you've considered

None really.

Affected product area (please put an X in all that apply)

[ ] Ambient
[ ] Docs
[ ] Dual Stack
[X] Installation
[ ] Networking
[ ] Performance and Scalability
[ ] Extensions and Telemetry
[ ] Security
[ ] Test and Release
[ ] User Experience
[ ] Developer Infrastructure

Affected features (please put an X in all that apply)

[ ] Multi Cluster
[ ] Virtual Machine
[ ] Multi Control Plane

Additional context