Fix failed tasks are not detected in AzureBatchHook

[ArvidMartensRenson]

This pull request fixes the issue that failed tasks are not detected by the microsoft azure batch hook. Main origin of the bug is found in using an exhausted iterator again to find the failed tasks. This PR captures the tasks in a list first which is afterwards used to the tasks analysis (task completion and failure detection). A bug in the failure comparison is also resolved.

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[eladkal]

Can you add unit test to avoid regression?

[eladkal]

tests are failing
https://github.com/apache/airflow/actions/runs/7526367969/job/20488626774?pr=36785#step:5:1115

[Lee-W]

I just traced the code. it indeed returns an iterator. Good finding!

[boring-cyborg]

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