Changes to Upsert billing price

added the new metronome enum value to the data/provider_type response property for the response status 201

added the new metronome enum value to the request property price_tiers/items/provider_type/allOf[#/components/schemas/BillingProviderType]

added the new metronome enum value to the request property provider_type/allOf[#/components/schemas/BillingProviderType]