stream: add diagnostics for readable stream chunk additions

[RaisinTen]

This adds a diagnostics channel for tracking chunk additions to readable streams without having any side-effects on user code.

This is needed for #60483 (comment)

[nodejs-github-bot]

Review requested:

• @nodejs/streams

[ronag]

I don't think this is necessary.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.58%. Comparing base (ba7cdf4) to head (1760239).
⚠️ Report is 46 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #60514 +/- ##
==========================================
+ Coverage 88.56% 88.58% +0.01% 
==========================================
Files 704 704 Lines 207774 207868 +94 Branches 40027 40052 +25 ==========================================
+ Hits 184020 184138 +118 + Misses 15800 15766 -34 - Partials 7954 7964 +10 

Files with missing lines	Coverage Δ
lib/internal/streams/readable.js	96.22% <100.00%> (+0.02%)	⬆️

... and 52 files with indirect coverage changes

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