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Reduce cluster-level RBAC scope #402

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Reduce cluster-level RBAC scope #402

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YCShen1010
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Summary:

  • Prunes excessive RBAC on the controller Role by dropping unused verbs and splitting pod access into its own rule
  • Restricts the controller ClusterRole to read/update webhook configs instead of full lifecycle control
  • Mirrors the RBAC in helm

Fix issue: https://github.ibm.com/IBMPrivateCloud/roadmap/issues/67915

@YCShen1010
remove unnecessary permission for helm
6255f20 
Signed-off-by: YuChen <yuchen.shen@mail.utoronto.ca>
@YCShen1010
reduce permissions
5d85d29 
Signed-off-by: YuChen <yuchen.shen@mail.utoronto.ca>
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