audit: Port audit_options strict rules to rubocop and add tests

[GauthamGoli]

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#569
Continuation of #2879
Had to convert the option node to string ( lines 27-28 ) because there is a negative regex match, hence was not able to reuse regex_match_group method which takes the node itself as an argument and does the regex match but the method does not do negative regex match. Please suggest if you think there's a better way to do this.

[JCount]

@GauthamGoli 🎊 Good work on getting another PR shipped!