helm: add new knob for enable rbac for gateway namespace mode

[zirain]

fixes: #5962

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.50%. Comparing base (eb7266c) to head (c4af426).
Report is 26 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5990      +/-   ##
==========================================
+ Coverage   70.48%   70.50%   +0.02%     
==========================================
  Files         219      219              
  Lines       36318    36318              
==========================================
+ Hits        25597    25605       +8     
+ Misses       9197     9191       -6     
+ Partials     1524     1522       -2     

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[arkodg]

this should be inside provider.kubernetes

[zirain]

I want to add a knob won't be part of configmap, so that users can enabled rbac first and reenable GNM later.

[arkodg]

users will still need to then define twice, and the primary way to define configimap is via helm today

[zirain]

either way is fine in this patch:

{{ if or $enabledInConfig $enabledInConfigmap }}