[FEATURE REQ] AZR-000302

### Please describe the feature or suggestion.

When the WAF Mode in BICEP or the ARM Template uses a conditional statement, it's flagging it as an error. Here is an example, in the development environment we set the mode to detection, but in all other environments we set to prevention.

"mode": "[if(equals(toLower(parameters('environment')), 'dev'), 'Detection', 'Prevention')]"

But, the templateanalyzer tool flags it as an error since it's not a fixed value of 'Prevention'. AZR-000302: Azure.AppGwWAF.PreventionMode.

Alternatively, if there was a way to ignore the rule I suppose that would be a stop gap.

Thanks

### Additional context

_No response_