JSqlParserQueryEnhancer works with non Select Statements.

[DiegoKrupitza]

Previously this implementation of QueryEnhancer could not handle non Select statements (such as Delete, Update, ...). With this commit we do handle them. Keep in mind that "enhancing" non selects does not have any effect on them (and the current default implementation QueryUtils does not care either aka it often just returns the same query, null or empty string).

Closes: #2555

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