Feature: Retry App Store Connect API requests that fail with server errors

[priitlatt]

Sometimes App Store Connect API responds to valid HTTP requests with server error response.

Those responses have status code 500 and have response payload as

{
    "errors": [
        {
            "status": "500",
            "code": "UNEXPECTED_ERROR",
            "title": "An unexpected error occurred.",
            "detail": "An unexpected error occurred on the server side. If this issue continues, contact us at https://developer.apple.com/contact/."
        }
    ]
}

Since this failure is unavoidable by the user, we should retry the request in case of server errors. As failed HTTP request break the whole action that depends on this failed App Store Connect API call, whole CI jobs can fail.

A common example of such interruption is when app-store-connect submit-to-app-store action is terminated due to 500 error in the middle of processing the upload.

With the changes in this PR app-store-connect tool gets a new option --api-server-error-retries that accepts integer values to define how many times App Store Connect API requests that fail due to server errors should be retried. By default three retry attemps are made.

Updated actions:

• All app-store-connect actions and subactions.