[OpenLineage] Add more debug logs to facilitate debugging

[kacpermuda]

After debugging some user issues i feel like we could add some more DEBUG level logs, so that we can deduce more information about what's happening inside OpenLineage. We should be able to trace the whole flow from loading the plugin, through configuration to event being emitted. We should not have to ask users for their configuration for simple debugging. I will follow up with another PR for OpenLineage Python client, so that it's also as descriptive as possible.

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