Migrate Samples to Perl 5.42

[pascalecu]

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For simplicity, please make sure that your pull request includes one and only one contribution.

Please fill one of the sections below as applicable.
Please also add any other relevant information to the Notes section at the bottom.
You may delete or just ignore any other sections.

I Am Modifying an Existing Code Snippet or Existing Tests

• I fixed Migrate Perl Samples to 5.42 #5952
• I did not include any extra folders/libraries
• I have read about modifying existing code snippets or tests in the contributing documentation
• I have explained why this modification is necessary either in the issue linked above or in the notes below
• I named the pull request using Modify {PROJECT} {tests} in {LANGUAGE} format

Other Notes

I changed the Perl version to 5.42 all the way back in #5100, but I didn't update the samples so they're up to par with modern Perl practices (or just Perl practices in general). A lot of the samples were very unidiomatic, messy (as in no formatting whatsoever) and don't represent how Perl has changed in the last 20 years.