Add test_connection method to AzureDataFactoryHook

[josh-fell]

Related: #21110

Adding functionality to test an Azure Data Factory connection prior to DAG execution.

Note: This enhancement depends on release of #21330 (currently slated for Airflow 2.3). If there is something else that I should add to this PR to set the minimum Airflow version of the Azure provider, let me know. Not sure if this type of change is handled before or during a provider release or if there some documentation I should also add here. If it's also easier to stash/set this to draft until after 2.3 is released or around its release time, happy to do so.

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[github-actions]

The PR is likely OK to be merged with just subset of tests for default Python and Database versions without running the full matrix of tests, because it does not modify the core of Airflow. If the committers decide that the full tests matrix is needed, they will add the label 'full tests needed'. Then you should rebase to the latest main or amend the last commit of the PR, and push it with --force-with-lease.