Silence a legitimate sanitizer warning that's enabled by default in Android NDK 29

[matthargett]

Silence a legitimate vfptr sanitizer warning that is on by default in Android NDK 29's clang. Stripping RTTI from a vfptr is usually a no-no for debugging and field-supportability reasons, but it's intrinsic to how ObjectWrap works right now.

This was found whilst porting BabylonNative (which implements NAPI for add-ons) to Android XR, and was integrated (and tested) there as a local patch:
https://github.com/BabylonJS/JsRuntimeHost/pull/118/files#diff-a9d53b78150c809d9bf63a90260b4f823918bc6e6d9c3e02eb68d855bf9deda1R4499

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 63.50%. Comparing base (60d439e) to head (9affd1c).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
napi-inl.h	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@ Coverage Diff @@## main #1692 +/- ## ========================================== + Coverage 63.48% 63.50% +0.01%  ========================================== Files 3 3 Lines 2046 2047 +1 Branches 728 728 ========================================== + Hits 1299 1300 +1  Misses 162 162 Partials 585 585 

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