webstreams: narrow ReadableStreamBYOBRequest.view to Uint8Array

[vedparkasharya]

ReadableStreamBYOBRequest.view is always constructed as a Uint8Array,
and the specification will be updated to enforce this.

Refs: whatwg/streams#1367
Fixes: #62952

[gurgunday]

Thanks, but duplicate of #62958

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.66%. Comparing base (c202696) to head (84e6dec).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #62970 +/- ##
==========================================
- Coverage 89.66% 89.66% -0.01% 
==========================================
Files 706 706 Lines 219416 219416 Branches 42073 42080 +7 ==========================================
- Hits 196738 196732 -6 - Misses 14576 14600 +24 + Partials 8102 8084 -18 

Files with missing lines	Coverage Δ
lib/internal/webstreams/readablestream.js	98.54% <100.00%> (ø)

... and 43 files with indirect coverage changes

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[vedparkasharya]

Thanks @gurgunday for pointing that out! I see that #62958 already covers this exact change. I'll close this PR to avoid duplication. Appreciate the heads-up! 🙏