'nslocalizedstring_key' now validates the comment argument in addition to the key argument

[daltonclaybrook]

This PR resolves #3334

[SwiftLintBot]

	2 Warnings
⚠️	This PR may need tests.
⚠️	This PR introduced a violation in WordPress: /WordPress/WordPressTest/I18n.swift:5:30: warning: NSLocalizedString Key Violation: Static strings should be used as key/comment in NSLocalizedString in order for genstrings to work. (nslocalizedstring_key)

	13 Messages
📖	Linting Aerial with this PR took 0.83s vs 0.81s on master (2% slower)
📖	Linting Alamofire with this PR took 0.99s vs 1.0s on master (1% faster)
📖	Linting Firefox with this PR took 3.8s vs 3.87s on master (1% faster)
📖	Linting Kickstarter with this PR took 6.49s vs 6.42s on master (1% slower)
📖	Linting Moya with this PR took 0.52s vs 0.51s on master (1% slower)
📖	Linting Nimble with this PR took 0.61s vs 0.6s on master (1% slower)
📖	Linting Quick with this PR took 0.34s vs 0.32s on master (6% slower)
📖	Linting Realm with this PR took 1.34s vs 1.35s on master (0% faster)
📖	Linting SourceKitten with this PR took 0.5s vs 0.5s on master (0% slower)
📖	Linting Sourcery with this PR took 2.58s vs 2.63s on master (1% faster)
📖	Linting Swift with this PR took 8.16s vs 8.2s on master (0% faster)
📖	Linting WordPress with this PR took 7.36s vs 7.37s on master (0% faster)
📖	This PR fixed a violation in WordPress: /WordPress/WordPressTest/I18n.swift:5:30: warning: NSLocalizedString Key Violation: Static strings should be used as key in NSLocalizedString in order to genstrings work. (nslocalizedstring_key)

Generated by 🚫 Danger

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@da408b5). Click here to learn what that means.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master    #3373   +/-   ##
=========================================
  Coverage          ?   90.54%           
=========================================
  Files             ?      417           
  Lines             ?    20523           
  Branches          ?        0           
=========================================
  Hits              ?    18583           
  Misses            ?     1940           
  Partials          ?        0           

Impacted Files	Coverage Δ
...ramework/Rules/Lint/NSLocalizedStringKeyRule.swift	100.00% <100.00%> (ø)

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[jpsim]

Fantastic, thanks for the PR! I'll be rebasing this and merging when CI passes.