fix: ignore 404 when canceling subscription in Stripe

[pavelbrm]

Summary

This PR updates the processing of an iOS webhook so that it only cancels an order in SKUs, and does not attempt to cancel it in Stripe, because there is obviously no such subscription.

There are many issues with the existing code for handling iOS webhook, but for now this is only to fix the cancelation. Other improvements will be made at a different time.

Type of Change

• Product feature
• Bug fix
• Performance improvement
• Refactor
• Other

Tested Environments

• Development
• Staging
• Production

Before Requesting Review

• Does your code build cleanly without any errors or warnings?
• Have you used auto closing keywords?
• Have you added tests for new functionality?
• Have validated query efficiency for new database queries?
• Have documented new functionality in README or in comments?
• Have you squashed all intermediate commits?
• Is there a clear title that explains what the PR does?
• Have you used intuitive function, variable and other naming?
• Have you requested security and/or privacy review if needed
• Have you performed a self review of this PR?

Manual Test Plan

[github-actions]

[puLL-Merge] - brave-intl/bat-go@2347

Description

This pull request makes changes to the controllers.go, controllers_test.go, input.go, model.go, model_test.go, order.go, service.go, service_nonint_test.go files in the services/skus directory. The changes involve refactoring, fixing errors, adding new functions, and improving code readability.

Changes

Changes

• services/skus/controllers.go
  • Refactor HandleIOSWebhook to handleIOSWebhook to follow naming conventions.
• services/skus/controllers_test.go
  • Update the test case to use handleIOSWebhook instead of HandleIOSWebhook.
• services/skus/input.go
  • Remove redundant logging messages in IOSNotification related functions.
• services/skus/model/model.go
  • Add new functions StripeSubID, IsIOS, IsAndroid, PaymentProc, Vendor in the Order struct for checking order details.
• services/skus/model/model_test.go
  • Add test cases for the newly added functions in the Order struct.
• services/skus/order.go
  • Refactor CancelOrder method to handle Stripe subscription cancellation based on order details and improve error handling.
• services/skus/service.go
  • Add new functions shouldCancelOrderIOS, appStoreTransaction, isErrStripeNotFound to improve code readability and error handling.
• services/skus/service_nonint_test.go
  • Add test cases for the new functions added in service.go.

Security Hotspots

1. The handleIOSWebhook function in controllers.go may not handle errors properly when verifying iOS subscription notifications. Ensure that error states and potential vulnerabilities are handled securely in this function.

[pavelbrm]

1. The handleIOSWebhook function in controllers.go may not handle errors properly when verifying iOS subscription notifications. Ensure that error states and potential vulnerabilities are handled securely in this function.

Oh, what age we are living in. 🤦‍♀️ . Go away, robot.

[pavelbrm]

@clD11 Decided to keep this 'active' here for now as we are not really interested in canceling already canceled subs.

What do you think?