CI: Setup cross build test

[inkydragon]

Part of #290

• arm
• aarch64
• ppc
• ppc64
• ppc64le
• mips
• mipsel
• riscv64
• s390x

TODO

maybe next time/pr

• loongarch64
  I tried installing the toolchain locally, but it doesn't compile properly yet. Need further attempts.

• Builds successfully, but tests fail.
  I'll open an issue to track this:

  • mips64: https://github.com/JuliaMath/openlibm/actions/runs/7551712094/job/20559382618?pr=296
  • mips64el: https://github.com/JuliaMath/openlibm/actions/runs/7551712094/job/20559382950?pr=296

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (master@d3be5df). Click here to learn what that means.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #296   +/-   ##
=========================================
  Coverage          ?   38.24%           
=========================================
  Files             ?      233           
  Lines             ?     6139           
  Branches          ?     1607           
=========================================
  Hits              ?     2348           
  Misses            ?     3394           
  Partials          ?      397           

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