Move provider's log task handlers to the provider package

[ephraimbuddy]

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This PR fixes some of the issues listed in #9386
CloudwatchTaskHandler, StackdriverTaskHandler, and ElasticsearchTaskHandler were all moved from airflow/utils/log/ to their respective providers package

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[turbaszek]

LGTM, can you please take a look at the docs error?

[ephraimbuddy]

Hi @turbaszek , please take a look.

[turbaszek]

@ephraimbuddy please rebase, I've just merged this fix in #9628

[turbaszek]

Would you mind adding a test in test_core_to_contrib.py?

[ephraimbuddy]

Hi @turbaszek, I want to combine #9624 and #9623 into this PR so it can be merged at once. WDYT?

[mik-laj]

@ephraimbuddy +1 That shouldn't be a problem for us.