SNOW-1984396: [Local Testing] Fix bug in Dataframe.except_

[sfc-gh-jrose]

1. Which Jira issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes SNOW-1984396

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
     • If this test skips Local Testing mode, I'm requesting review from @snowflakedb/local-testing
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am adding new credentials
   • I am adding a new dependency
   • If this is a new feature/behavior, I'm adding the Local Testing parity changes.
   • I acknowledge that I have ensured my changes to be thread-safe. Follow the link for more information: Thread-safe Developer Guidelines

3. Please describe how your code solves the related issue.

   This PR rewrites the local testing case for EXCEPT operator case for finding the difference between two dataframes. The original approach had edge cases that caused data in multiple rows to be included when dropping individual rows. The new approach takes an alternative approach by concatting the right side twice and then removing all rows that have more than one instance.

See #3163 for more information.

[sfc-gh-snowflakedb-snyk-sa]

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