NIFI-14200 Replaced the use of deprecated org.apache.commons:commons-csv:1.13.0 constructs with suggested replacements.

[dan-s1]

Summary

NIFI-14200
Replaced all the deprecated methods and implemented Intellij suggestions to use Java 21 constructs such as Set.of, String.repeat, List.copyOf etc.

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  • JDK 21

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[exceptionfactory]

Thanks for updating these deprecated methods @dan-s1, looks good! +1 merging