[SPARK] support column lineage for merge into on databricks

[pawel-big-lebowski]

Problem

merge into is not supported on Databricks platform which is a result of MergeIntoCommandEdge node within logical plan, where MergeIntoCommandEdge is not present within Spark nor Delta codebase.

Solution

Extract lineage from MergeIntoCommandEdge class.

Note: All schema changes require discussion. Please link the issue for context.

• Your change modifies the core OpenLineage model
• Your change modifies one or more OpenLineage facets

If you're contributing a new integration, please specify the scope of the integration and how/where it has been tested (e.g., Apache Spark integration supports S3 and GCS filesystem operations, tested with AWS EMR).

One-line summary:

Checklist

• You've signed-off your work
• Your pull request title follows our guidelines
• Your changes are accompanied by tests (if relevant)
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• Your comment includes a one-liner for the changelog about the specific purpose of the change (if necessary)
• You've versioned the core OpenLineage model or facets according to SchemaVer (if relevant)
• You've added a header to source files (if relevant)

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SPDX-License-Identifier: Apache-2.0
Copyright 2018-2023 contributors to the OpenLineage project

[pawel-big-lebowski]

Successful pass of the CI with Databricks tests enabled:
https://app.circleci.com/pipelines/github/OpenLineage/OpenLineage/8785/workflows/11274f05-7e59-41be-9f1c-c48cab3076a7