Extra test macros for ARM32/ARM64

[mjcarroll]

🎉 New feature

Closes #82

Summary

Adds macros for enabling/disabling tests based on ARM32/ARM64 platforms.

Test it

Checklist

• [ ] Signed all commits for DCO
• [ ] Added tests
• [ ] Added example and/or tutorial
• [ ] Updated documentation (as needed)
• [ ] Updated migration guide (as needed)
• [ ] Consider updating Python bindings (if the library has them)
• [ ] codecheck passed (See contributing)
• [ ] All tests passed (See test coverage)
• [ ] While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov[bot]]

Codecov Report

Merging #99 (0a0f673) into gz-utils2 (9bd589a) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 0a0f673 differs from pull request most recent head 368879b. Consider uploading reports for the commit 368879b to get more accurate results

@@            Coverage Diff             @@
##           gz-utils2      #99   +/-   ##
==========================================
  Coverage      79.45%   79.45%           
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  Files              8        8           
  Lines            331      331           
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  Hits             263      263           
  Misses            68       68