Add "withCustom" argument for getValidPedModels on client side

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Is your feature request related to a problem? Please describe.
getValidPedModels on client-side returns also custom ID's from engineRequestModel. If we get valid ped model on client-side and trigger it to server-side where we create ped then we get warning and createPed will returns false because id is custom model.

Describe the solution you'd like
The best solution for this will be add a withCustom argument (default true). This argument should working only on client-side and returns valid ped models including custom models or without custom models.

Describe alternatives you've considered

Additional context