Changes to List billing periods with their carbon receipt and statement

added the required property data/items/allOf[#/components/schemas/BillingPeriod]/statementStatus to the response with the 200 status

added the new payg enum value to the data/items/allOf[#/components/schemas/BillingPeriod]/planTierAtClose response property for the response status 200

the data/items response's property type changed from object to no type for status 200

removed the required property data/items/billingPeriodId from the response with the 200 status

removed the required property data/items/co2Kg from the response with the 200 status

removed the required property data/items/createdAt from the response with the 200 status

removed the required property data/items/id from the response with the 200 status

removed the required property data/items/isSigned from the response with the 200 status

removed the required property data/items/pdfUrl from the response with the 200 status

removed the required property data/items/previewUrl from the response with the 200 status

removed the required property data/items/serialAllocations from the response with the 200 status

removed the required property data/items/signedAt from the response with the 200 status

removed the required property data/items/verificationUrl from the response with the 200 status

added BillingPeriod subschema #2 to the data/items response property allOf list for the response status 200