[FEATURE REQ] Handle 429 responses in the extractor without failing the whole process

[DSpirit]

Please describe the feature.

As an API Operator,
I want to extract many API's (more than 200), backends, tags etc. without getting 429 exceptions that break the process completely.

Running such big operations, I often experience results like:
SubscriptionRequestsThrottled
with error messages as follows:
System.Net.Http.HttpRequestException: HTTP request to URI https://management.azure.com/subscriptions/***/resourceGroups/***/providers/Microsoft.ApiManagement/service/***/apiVersionSets/***?api-version=2023-09-01-preview failed with status code 429. Content is '{"error":{"code":"SubscriptionRequestsThrottled","message":"Number of 'read' requests for subscription actor '***:***' exceeded. Please try again after '1' seconds after additional tokens are available. Refer to https://aka.ms/arm-throttling for additional information."}}'.

Here's a simple PR that worked for me: #611

Feedback is welcome, my internal test ran successfully (within the first try!).

[github-actions]

  Thank you for opening this issue! Please be patient while we will look into it and get back to you as this is an open source project. In the meantime make sure you take a look at the [closed issues](https://github.com/Azure/apiops/issues?q=is%3Aissue+is%3Aclosed) in case your question has already been answered. Don't forget to provide any additional information if needed (e.g. scrubbed logs, detailed feature requests,etc.).
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