fix: free workshop under condition

src/app/form/form-view/form-view.component.ts

...re-training-price/structure-training-price.component.html

...ture-training-price/structure-training-price.component.ts

src/app/models/structure.model.ts

...-edition-summary/structure-edition-summary.component.html

...re-edition-summary/structure-edition-summary.component.ts

...pp/shared/components/radio-form/radio-form.component.html

src/app/shared/components/radio-form/radio-form.component.ts

...onents/structure-details/structure-details.component.html

...mponents/structure-details/structure-details.component.ts

src/app/structure/enums/freeWorkshop.enum.ts

src/app/utils/utils.ts