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03f62faf - feat: add connection check method to all source and destination connectors (#2000)

feat: add connection check method to all source and destination connectors (#2000) ### Description Add a `check_connection` method to each connector to easily be able to check it without running the full ingest process. As part of this PR, some refactoring done to allow clients to be shared and populated across the `check_connection` method and the `initialize` method, allowing for the `check_connection` method to be called without having to rely on the `initialize` one to be called first. * bonus: fix the changelog --------- Co-authored-by: ryannikolaidis <1208590+ryannikolaidis@users.noreply.github.com>