when retryable error happens, cosmos client returns empty result for pagination query

[hihihuhu]

• Package Name: azure-cosmos
• Package Version: 4.5.2b5 (as well as master)
• Operating System: linux
• Python Version: 3.11

Describe the bug
the very first pagination query, means no continuation token, returns no result if a retryable error happens

specifically, if https://github.com/Azure/azure-sdk-for-python/blob/azure-cosmos_4.5.2b5/sdk/cosmos/azure-cosmos/azure/cosmos/_execution_context/aio/base_execution_context.py#L127 throws exception, _has_started, which is set to True already, won't be revert back to the original value, thus when retry calling into _fetch_items_helper_no_retries, it will skip the while loop if there is continuation token, and returns 0 result.

we have verified, if we try catch https://github.com/Azure/azure-sdk-for-python/blob/azure-cosmos_4.5.2b5/sdk/cosmos/azure-cosmos/azure/cosmos/_execution_context/aio/base_execution_context.py#L127 and revert _has_started back to the original value, then the issue is resolved.

To Reproduce
Steps to reproduce the behavior:

1. send any no QueryItems query with expected non empty result concurrently
2. until hitting 429
3. some of the query start returning empty result

Expected behavior
A clear and concise description of what you expected to happen.
the query should either fail or return correct result

Screenshots
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Additional context
Add any other context about the problem here.

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @AbhinavTrips @bambriz @pjohari-ms @simorenoh.

[bambriz]

This issue is addressed and fixed in PR 35090 @hihihuhu @nicknotfun