Disable AVX default for PPC and ARM

[chaeyeunpark]

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Context: Wheelbuilder does not work for PPC and ARM in 19a8a85 as AVX is enabled by default in CMake.

Description of the Change: Turned it off.

Benefits:

Possible Drawbacks:

Related GitHub Issues:

[github-actions]

Hello. You may have forgotten to update the changelog!
Please edit .github/CHANGELOG.md with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
• Your name (or GitHub username) in the contributors section.

[codecov]

Codecov Report

Merging #182 (2d50d57) into master (19a8a85) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #182   +/-   ##
=======================================
  Coverage   92.97%   92.97%           
=======================================
  Files           4        4           
  Lines         185      185           
=======================================
  Hits          172      172           
  Misses         13       13           

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[github-actions]

Test Report (C++) on Ubuntu

       1 files  ±0         1 suites  ±0   0s ⏱️ ±0s
   345 tests ±0     345 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
1 919 runs  ±0  1 919 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 2d50d57. ± Comparison against base commit 19a8a85.