[SEDONA-229] Remove Duplicate String Check

[douglasdennis]

Did you read the Contributor Guide?

• Yes, I have read Contributor Rules and Contributor Development Guide

Is this PR related to a JIRA ticket?

• Yes, the URL of the associated JIRA ticket is https://issues.apache.org/jira/browse/SEDONA-229.

What changes were proposed in this PR?

This PR disables the scalastyle check called MultipleStringLiteralsChecker. This check is responsible for detecting multiple occurrences of the same string literal in the same file. From what I could gather, the reason for this check is to detect potential cases of "magic numbers" or constants that should be consolidated into a constant variable. There are three issues with this check:

• There is a bug in the check which flags fragments of interpolated strings as duplicates even though the string as a whole is not a duplicate.
• The main offender for this check are the tests. This is because of very common column names like "geom". The mass majority of these checks are false alerts. There was one instance of this check flagging non-test code and it provided little value to fix it.
• Spark SQL uses a lot of strings and I wouldn't call it bad practice to do so.

This check did reveal some refactor points in the tests, but I would think that folks could already see that the tests could use some refactoring. In other words, this check doesn't flag anything that isn't obvious without it.

I did give a go at removing all duplicate strings for the sedona sql module and it led to some really ugly constant declarations in the test classes. Some nice refactors of the tests did fall out, and I will try to PR those once the linter messages are cleaned up.

How was this patch tested?

Ran the standard build process. This doesn't change any actual code.

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the docs.

[douglasdennis]

Well, I was finally able to get to putting these PRs up. This is just one of several more to clean up the linter messages.