Data: Refactor to reduce size

[gibson042]

• Return the new value from set(owner, key, value).
• Use set(owner, key, value) rather than access(owner, key, value).

Summary

Improvements noticed in passing.

main @88690ebfc8b5ef8b1e444326c664b590ecc0b888
   raw     gz Filename
   -44    -17 dist/jquery.min.js
   -35    -16 dist/jquery.slim.min.js
   -44    -21 dist-module/jquery.module.min.js
   -35    -15 dist-module/jquery.slim.module.min.js

Checklist

• [x] New tests have been added to show the fix or feature works
• [x] If needed, a docs issue/PR was created at https://github.com/jquery/api.jquery.com