Expand locale timeframe testing for multiple variations

[neelrpatel]

Pull Request Checklist

Thank you for taking the time to improve Arrow! Before submitting your pull request, please check all appropriate boxes:

• [x] 🧪 Added tests for changed code.
• [x] 🛠️ All tests pass when run locally (run tox or make test to find out!).
• [x] 🧹 All linting checks pass when run locally (run tox -e lint or make lint to find out!).
• [x] 📚 Updated documentation for changed code.
• [x] ⏩ Code is up-to-date with the master branch.

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Description of Changes

Resolves #1022

Timeframe testing for multiple variations expanded for the following locales:

• Finnish
• Czech
• Hungarian
• Hebrew
• Sinhala
• Croatian
• Serbian
• Zulu

[codecov[bot]]

Codecov Report

Merging #1073 (50ae019) into master (d688de4) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #1073   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           10        10           
  Lines         2232      2232           
  Branches       437       437           
=========================================
  Hits          2232      2232           

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[krisfremen]

@neelrpatel thanks for contributing!

Approved the checks to run, will review soon