stream: reject push iterator.throw() with error

[trivikr]

Fixes: #64378

This updates stream/iter push readable iterators so
iterator.throw(error) rejects with the supplied error instead of
resolving with { done: true, value: undefined }.

The existing cancellation behavior is preserved: pending reads, writes,
and drain waiters still observe the consumer error.

---

Assisted-by: openai:gpt-5.5

[nodejs-github-bot]

Review requested:

• @nodejs/streams

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.24%. Comparing base (0032189) to head (b1e4e88).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #64380   +/-   ##
=======================================
  Coverage   90.23%   90.24%           
=======================================
  Files         741      741           
  Lines      241194   241194           
  Branches    45432    45431    -1     
=======================================
+ Hits       217640   217663   +23     
+ Misses      15129    15089   -40     
- Partials     8425     8442   +17     

Files with missing lines	Coverage Δ
lib/internal/streams/iter/push.js	90.84% <100.00%> (ø)

... and 36 files with indirect coverage changes

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