Provide hasOwn polyfill configuration option.

[dpvc]

This PR provides the option if installing a polypill for the Object.hasOwn() method, since that seems to be the only significant thing that we are using that isn't in ES2017 or earlier. The default is false, since this modifies global objects, and the page author should ned to opt-in for that.

[codecov]

Codecov Report

❌ Patch coverage is 41.66667% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.71%. Comparing base (afaf1ea) to head (5651923).

Files with missing lines	Patch %	Lines
components/mjs/startup/hasown.js	30.00%	7 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1351      +/-   ##
===========================================
- Coverage    86.72%   86.71%   -0.01%     
===========================================
  Files          337      338       +1     
  Lines        84145    84157      +12     
  Branches      3140     4771    +1631     
===========================================
+ Hits         72971    72976       +5     
- Misses       11174    11181       +7     

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