Helm Param Update: Default to agones.controller if agones.extensions is Missing

[Kalaiselvi84]

What happened:
The Helm chart uses old parameters under .Values.agones.controller which were supposed to be migrated to .Values.agones.extensions.

What you expected to happen:
Replace with new parameters under .Values.agones.extensions. The Helm chart should allow for backward compatibility by defaulting to old parameters if new ones are not set.

Anything else we need to know?:
This issue requires updating the Helm chart to include fallback mechanisms using default and or empty functions to ensure configurations using old parameters still function correctly.

https://helm.sh/docs/chart_template_guide/function_list/#default
https://helm.sh/docs/chart_template_guide/function_list/#empty

[markmandel]

Just a note - it's not all the .Values.agones.controller values, it's just the items that were highlighted in:
https://github.com/googleforgames/agones/pull/3735/files

So basically the things that affect the extensions - controller should stay the same.

[GOOFY635273529]

ok