[Azure] Remove unnecessary virtualMachines/extensions permissions

Author: bennerv

install/0000_30_machine-api-operator_00_credentials-request.yaml

@@ -91,9 +91,6 @@ spec:
     - Microsoft.Compute/galleries/images/versions/read
     - Microsoft.Compute/skus/read
     - Microsoft.Compute/virtualMachines/delete
-    - Microsoft.Compute/virtualMachines/extensions/delete
-    - Microsoft.Compute/virtualMachines/extensions/read
-    - Microsoft.Compute/virtualMachines/extensions/write
     - Microsoft.Compute/virtualMachines/read
     - Microsoft.Compute/virtualMachines/write
     - Microsoft.ManagedIdentity/userAssignedIdentities/assign/action