Add fields to SFDC opportunity objects mapping

<!-- Please complete the template below as best as you can. Make sure to check if this issue has already been raised by someone else first to avoid duplication. 

For each section below, please add screenshots or links or anything that may help visual learners understand the problem better, even if this takes you an extra minute or two this is a great help to some folks.

https://www.learning-styles-online.com/style/visual-spatial/

-->

### Problem

After testing the changes added in https://gitlab.com/gitlab-org/customers-gitlab-com/-/issues/2097 the team decided that more data is needed for the `QuoteRatePlanCharge` object to be complete and usable in SFDC.

| Data Name               | SFDC Quote Rate Plan Charge Field | Zuora Field                                        | Type              |
|-------------------------|-----------------------------------|----------------------------------------------------|-------------------|
| Amendment Type          |          Webstore_Zuora_Type__c                         | InvoiceItem:Amendment->Type                        | String            |
| Quantity                |           Webstore_Zuora_Quantity__c                        | InvoiceItem->Quantity                              | Number(13, 5)     |
| Effect Price            |         Webstore_Zuora_Effective_Price__c                          | InvoiceItem->Charge Amount                         | Currency          |
| DTCV                    |             Webstore_Zuora_DTCV__c                      | InvoiceItem:Rate Plan Charge->DTCV                 | Currency          |
| DMRC                    |             Webstore_Zuora_DMRC__c                      | InvoiceItem:Rate Plan Charge->DMRC                 | Currency          |
| MRR                     |        Webstore_Zuora_MRR__c                           | InvoiceItem:Rate Plan Charge->MRR                  | Currency          |
| Service End Date        |             Webstore_Zuora_Service_End_Date__c                      | InvoiceItem->Service End Date                      | Date (YYYY-MM-DD) |
| Service Start Date      |             Webstore_Zuora_Service_Start_Date__c                      | InvoiceItem->Service Start Date                    | Date (YYYY-MM-DD) |
| Description             |             Webstore_Zuora_Description__c                      | InvoiceItem:Amendment->Description                 | String            |
| Amendment ID                      |         Webstore_Zuora_Amendment_ID__c                          | InvoiceItem:Amendment->ID                          | String            |
| Name                    |            Webstore_Zuora_Name__c                       | InvoiceItem:Amendment->Name                        | String            |
| Invoice ID                      |      Webstore_Zuora_Invoice_ID__c                             | InvoiceItem:Invoice->ID                            | String            |
| Invoice Number          |            Webstore_Zuora_Invoice_Number__c                       | InvoiceItem:Invoice->Invoice Number                | String            |
| Rate Plan ID                    |           Webstore_Zuora_Rate_Plan_ID__c                        | InvoiceItem:Rate Plan->ID                          | String            |
| Effective End Date      |            Webstore_Zuora_Effective_End_Date__c                       | InvoiceItem:Rate Plan Charge->Effective End Date   | Date (YYYY-MM-DD) |
| Effective Start Date    |        Webstore_Zuora_Effective_Start_Date__c                           | InvoiceItem:Rate Plan Charge->Effective Start Date | Date (YYYY-MM-DD) |
| TCV                     |             Webstore_Zuora_TCV__c                      | InvoiceItem:Rate Plan Charge->TCV                  | Currency          |
| Subscription ID                      |        Webstore_Zuora_Subscription_ID__c                           | InvoiceItem:Subscription->ID                       | String            |
| Original Subscription ID             |         Webstore_Zuora_Original_Subscription_ID__c                          | InvoiceItem:Subscription->Original ID              | String            |
| Subscription End Date   |         Webstore_Zuora_Subscription_End_Date__c                          | InvoiceItem:Subscription->Subscription End Date    | Date (YYYY-MM-DD) |
| Subscription Start Date |     Webstore_Zuora_Subscription_Start_Date__c                              | InvoiceItem:Subscription->Subscription Start Date  | Date (YYYY-MM-DD) |

### Proposal

We need to update `Salesforce::CreateOpportunityObjectsService` and `Salesforce::CreateQuoteRatePlanChargeService` to send all this data over to SFDC.

### Result

Raw data that can be used to make all the calculations needed in SFDC side.

### Next steps (if any)

### How will we measure success?

Story points: 2.0